diff --git a/CredentialManager/app/build.gradle b/CredentialManager/app/build.gradle
index 3399850..afd26fa 100644
--- a/CredentialManager/app/build.gradle
+++ b/CredentialManager/app/build.gradle
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
@@ -7,13 +23,10 @@ repositories {
     mavenCentral()
 }
 
-// Create a variable called keystorePropertiesFile, and initialize it to your
-// keystore.properties file, in the rootProject folder.
+// Load keystore properties for our signing key
+// (see developer.android.com/studio/publish/app-signing)
 def keystorePropertiesFile = rootProject.file("keystore.properties")
-
 def keystoreProperties = new Properties()
-
-// Load keystore properties for our signing key (see developer.android.com/studio/publish/app-signing)
 keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
 
 android {
diff --git a/CredentialManager/app/src/main/AndroidManifest.xml b/CredentialManager/app/src/main/AndroidManifest.xml
index ef5c4a2..6b9638a 100644
--- a/CredentialManager/app/src/main/AndroidManifest.xml
+++ b/CredentialManager/app/src/main/AndroidManifest.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
diff --git a/CredentialManager/app/src/main/assets/RegFromServer b/CredentialManager/app/src/main/assets/RegFromServer
index a51f712..469c45a 100644
--- a/CredentialManager/app/src/main/assets/RegFromServer
+++ b/CredentialManager/app/src/main/assets/RegFromServer
@@ -1,5 +1,5 @@
 {
-    "challenge": "$4",
+    "challenge": "<challenge>",
     "rp": {
         "id": "passkeys-codelab.glitch.me",
         "name": "CredMan App Test"
@@ -19,8 +19,8 @@
         "residentKey": "required"
     },
     "user": {
-           "id": "$3",
-           "name": "$1",
-           "displayName": "$2"
+           "id": "<userId>",
+           "name": "<userName>",
+           "displayName": "<userDisplayName>"
        }
 }
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/DataProvider.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/DataProvider.kt
index 0312edc..9ccb42b 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/DataProvider.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/DataProvider.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,7 +29,8 @@ object DataProvider {
     private const val PREF_NAME = "CREDMAN_PREF"
 
     fun initSharedPref(context: Context) {
-        sharedPreference = context.applicationContext.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
+        sharedPreference =
+            context.applicationContext.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
         editor = sharedPreference.edit()
     }
 
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/Extensions.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/Extensions.kt
index afa35b9..ae92370 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/Extensions.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/Extensions.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,4 +35,3 @@ fun Context.showErrorAlert(msg: String) {
         .setIcon(android.R.drawable.ic_dialog_alert)
         .show()
 }
-
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/HomeFragment.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/HomeFragment.kt
index ddf5130..6843c61 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/HomeFragment.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/HomeFragment.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainActivity.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainActivity.kt
index 997d60a..8c5c51f 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainActivity.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainActivity.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,12 +56,12 @@ class MainActivity : AppCompatActivity(), MainFragmentCallback, HomeFragmentCall
     }
 
     override fun logout() {
-        supportFragmentManager.popBackStack("home", FragmentManager.POP_BACK_STACK_INCLUSIVE);
+        supportFragmentManager.popBackStack("home", FragmentManager.POP_BACK_STACK_INCLUSIVE)
         loadMainFragment()
     }
 
     private fun loadMainFragment() {
-        supportFragmentManager.popBackStack();
+        supportFragmentManager.popBackStack()
         loadFragment(MainFragment(), false)
     }
 
@@ -80,7 +80,7 @@ class MainActivity : AppCompatActivity(), MainFragmentCallback, HomeFragmentCall
         if (DataProvider.isSignedIn() || supportFragmentManager.backStackEntryCount == 1) {
             finish()
         } else {
-            super.onBackPressed();
+            super.onBackPressed()
         }
     }
 }
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainFragment.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainFragment.kt
index 71f8bc3..5a36663 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainFragment.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/MainFragment.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignInFragment.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignInFragment.kt
index b1e3a39..922b988 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignInFragment.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignInFragment.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -106,34 +106,36 @@ class SignInFragment : Fragment() {
         val getPublicKeyCredentialOption =
             GetPublicKeyCredentialOption(fetchAuthJsonFromServer(), null, true)
         val getPasswordOption = GetPasswordOption()
-        try {
-            val result = credentialManager.getCredential(
+        val result = try {
+            credentialManager.getCredential(
                 GetCredentialRequest(
                     listOf(
                         getPublicKeyCredentialOption,
                         getPasswordOption
                     )
-                ), requireActivity()
+                ),
+                requireActivity()
             )
-
-            if (result.credential is PublicKeyCredential) {
-                val cred = result.credential as PublicKeyCredential
-                DataProvider.setSignedInThroughPasskeys(true)
-                return "Passkey: ${cred.authenticationResponseJson}"
-            }
-            if (result.credential is PasswordCredential) {
-                val cred = result.credential as PasswordCredential
-                DataProvider.setSignedInThroughPasskeys(false)
-                return "Got Password - User:${cred.id} Password: ${cred.password}"
-            }
         } catch (e: Exception) {
             configureViews(View.INVISIBLE, true)
-            Log.e("Auth", " Exception Message" + e.message.toString())
+            Log.e("Auth", "getCredential failed with exception: " + e.message.toString())
             activity?.showErrorAlert(
                 "An error occurred while authenticating through saved credentials. Check logs for additional details"
             )
             return null
         }
+
+        if (result.credential is PublicKeyCredential) {
+            val cred = result.credential as PublicKeyCredential
+            DataProvider.setSignedInThroughPasskeys(true)
+            return "Passkey: ${cred.authenticationResponseJson}"
+        }
+        if (result.credential is PasswordCredential) {
+            val cred = result.credential as PasswordCredential
+            DataProvider.setSignedInThroughPasskeys(false)
+            return "Got Password - User:${cred.id} Password: ${cred.password}"
+        }
+
         return null
     }
 
diff --git a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignUpFragment.kt b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignUpFragment.kt
index 9b7d1eb..466ba04 100644
--- a/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignUpFragment.kt
+++ b/CredentialManager/app/src/main/java/com/google/credentialmanager/sample/SignUpFragment.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Android Open Source Project
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -143,10 +143,10 @@ class SignUpFragment : Fragment() {
         val response = requireContext().readFromAsset("RegFromServer")
 
         //Update userId, name and Display name in the mock
-        return response.replace("$1", binding.username.text.toString())
-            .replace("$4", getEncodedChallenge())
-            .replace("$3", getEncodedUserId())
-            .replace("$2", binding.username.text.toString())
+        return response.replace("<userId>", getEncodedUserId())
+            .replace("<userName>", binding.username.text.toString())
+            .replace("<userDisplayName>", binding.username.text.toString())
+            .replace("<challenge>", getEncodedChallenge())
     }
 
     private fun getEncodedUserId(): String {
@@ -177,7 +177,7 @@ class SignUpFragment : Fragment() {
         try {
             credentialManager.createCredential(request, requireActivity()) as CreatePasswordResponse
         } catch (e: Exception) {
-            Log.e("Auth", " Exception Message : " + e.message)
+            Log.e("Auth", "createPassword failed with exception: " + e.message)
         }
     }
 
@@ -191,7 +191,7 @@ class SignUpFragment : Fragment() {
             ) as CreatePublicKeyCredentialResponse
         } catch (e: CreateCredentialException) {
             configureProgress(View.INVISIBLE)
-            handleFailure(e)
+            handlePasskeyFailure(e)
         }
         return response
     }
@@ -207,38 +207,30 @@ class SignUpFragment : Fragment() {
         binding.circularProgressIndicator.visibility = visibility
     }
 
-    //Demonstration purpose : These are type of errors during passkey creation, handle this in your code wisely.
-    private fun handleFailure(e: CreateCredentialException) {
-        var msg = ""
-        when (e) {
+    // These are types of errors that can occur during passkey creation.
+    private fun handlePasskeyFailure(e: CreateCredentialException) {
+        val msg = when (e) {
             is CreatePublicKeyCredentialDomException -> {
                 // Handle the passkey DOM errors thrown according to the
                 // WebAuthn spec using e.domError
-                msg =
-                    "An error occurred while creating a passkey, please check logs for additional details"
+                "An error occurred while creating a passkey, please check logs for additional details."
             }
             is CreateCredentialCancellationException -> {
                 // The user intentionally canceled the operation and chose not
                 // to register the credential.
-                msg =
-                    "The user intentionally canceled the operation and chose not to register the credential. , please check logs for additional details"
+                "The user intentionally canceled the operation and chose not to register the credential. Check logs for additional details."
             }
             is CreateCredentialInterruptedException -> {
-                msg =
-                    "The operation was interrupted, please retry the call. Check logs for additional details"
                 // Retry-able error. Consider retrying the call.
+                "The operation was interrupted, please retry the call. Check logs for additional details."
             }
             is CreateCredentialProviderConfigurationException -> {
                 // Your app is missing the provider configuration dependency.
-                // Most likely, you're missing the
-                // "credentials-play-services-auth" module.
-                msg =
-                    "Your app is missing the provider configuration dependency. Check logs for additional details"
+                // Most likely, you're missing "credentials-play-services-auth".
+                "Your app is missing the provider configuration dependency. Check logs for additional details."
             }
             is CreateCredentialUnknownException -> {
-                msg =
-                    "An unknown error occurred while creating passkey. Check logs for additional details"
-                Log.w("Auth", e.message.toString())
+                "An unknown error occurred while creating passkey. Check logs for additional details."
             }
             is CreateCustomCredentialException -> {
                 // You have encountered an error from a 3rd-party SDK. If you
@@ -247,12 +239,14 @@ class SignUpFragment : Fragment() {
                 // should check for any custom exception type constants within
                 // that SDK to match with e.type. Otherwise, drop or log the
                 // exception.
-                msg =
-                    "An unknown error occurred from a 3rd party SDK. Check logs for additional details"
+                "An unknown error occurred from a 3rd party SDK. Check logs for additional details."
+            }
+            else -> {
+                Log.w("Auth", "Unexpected exception type ${e::class.java.name}")
+                "An unknown error occurred."
             }
-            else -> Log.w("Auth", "Unexpected exception type ${e::class.java.name}")
         }
-        Log.e("Auth", " Exception Message : " + e.message.toString())
+        Log.e("Auth", "createPasskey failed with exception: " + e.message.toString())
         activity?.showErrorAlert(msg)
     }
 
diff --git a/CredentialManager/app/src/main/res/drawable-v24/ic_launcher_foreground.xml b/CredentialManager/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
index 2b068d1..558f4cb 100644
--- a/CredentialManager/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
+++ b/CredentialManager/app/src/main/res/drawable-v24/ic_launcher_foreground.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:aapt="http://schemas.android.com/aapt"
     android:width="108dp"
@@ -27,4 +43,4 @@
         android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
         android:strokeWidth="1"
         android:strokeColor="#00000000" />
-</vector>
\ No newline at end of file
+</vector>
diff --git a/CredentialManager/app/src/main/res/drawable-v24/passkey.xml b/CredentialManager/app/src/main/res/drawable-v24/passkey.xml
index 5d01d51..2af1610 100644
--- a/CredentialManager/app/src/main/res/drawable-v24/passkey.xml
+++ b/CredentialManager/app/src/main/res/drawable-v24/passkey.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="48dp"
     android:height="48dp"
diff --git a/CredentialManager/app/src/main/res/drawable/ic_launcher_background.xml b/CredentialManager/app/src/main/res/drawable/ic_launcher_background.xml
index b03f0f5..c4060ee 100644
--- a/CredentialManager/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/CredentialManager/app/src/main/res/drawable/ic_launcher_background.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
     android:height="108dp"
diff --git a/CredentialManager/app/src/main/res/layout/activity_main.xml b/CredentialManager/app/src/main/res/layout/activity_main.xml
index d457e91..8b68864 100644
--- a/CredentialManager/app/src/main/res/layout/activity_main.xml
+++ b/CredentialManager/app/src/main/res/layout/activity_main.xml
@@ -1,7 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/fragment_container"
     android:layout_width="match_parent"
     android:layout_height="match_parent"/>
-
-
diff --git a/CredentialManager/app/src/main/res/layout/fragment_home.xml b/CredentialManager/app/src/main/res/layout/fragment_home.xml
index 329806b..79ad362 100644
--- a/CredentialManager/app/src/main/res/layout/fragment_home.xml
+++ b/CredentialManager/app/src/main/res/layout/fragment_home.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
diff --git a/CredentialManager/app/src/main/res/layout/fragment_main.xml b/CredentialManager/app/src/main/res/layout/fragment_main.xml
index e7eb27c..36221bb 100644
--- a/CredentialManager/app/src/main/res/layout/fragment_main.xml
+++ b/CredentialManager/app/src/main/res/layout/fragment_main.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
diff --git a/CredentialManager/app/src/main/res/layout/fragment_sign_in.xml b/CredentialManager/app/src/main/res/layout/fragment_sign_in.xml
index 09f14ec..289eb17 100644
--- a/CredentialManager/app/src/main/res/layout/fragment_sign_in.xml
+++ b/CredentialManager/app/src/main/res/layout/fragment_sign_in.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
diff --git a/CredentialManager/app/src/main/res/layout/fragment_sign_up.xml b/CredentialManager/app/src/main/res/layout/fragment_sign_up.xml
index 68e3593..c32c7b1 100644
--- a/CredentialManager/app/src/main/res/layout/fragment_sign_up.xml
+++ b/CredentialManager/app/src/main/res/layout/fragment_sign_up.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
diff --git a/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml b/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
index 6b78462..b937bed 100644
--- a/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
+++ b/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@drawable/ic_launcher_background" />
     <foreground android:drawable="@drawable/ic_launcher_foreground" />
diff --git a/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml b/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
index 6b78462..b937bed 100644
--- a/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
+++ b/CredentialManager/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@drawable/ic_launcher_background" />
     <foreground android:drawable="@drawable/ic_launcher_foreground" />
diff --git a/CredentialManager/app/src/main/res/values-land/dimens.xml b/CredentialManager/app/src/main/res/values-land/dimens.xml
index ec4deb8..79af8e2 100644
--- a/CredentialManager/app/src/main/res/values-land/dimens.xml
+++ b/CredentialManager/app/src/main/res/values-land/dimens.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <dimen name="fab_margin">48dp</dimen>
 </resources>
diff --git a/CredentialManager/app/src/main/res/values-w1240dp/dimens.xml b/CredentialManager/app/src/main/res/values-w1240dp/dimens.xml
index 2ecead2..048b1ae 100644
--- a/CredentialManager/app/src/main/res/values-w1240dp/dimens.xml
+++ b/CredentialManager/app/src/main/res/values-w1240dp/dimens.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <dimen name="fab_margin">200dp</dimen>
 </resources>
diff --git a/CredentialManager/app/src/main/res/values-w600dp/dimens.xml b/CredentialManager/app/src/main/res/values-w600dp/dimens.xml
index ec4deb8..79af8e2 100644
--- a/CredentialManager/app/src/main/res/values-w600dp/dimens.xml
+++ b/CredentialManager/app/src/main/res/values-w600dp/dimens.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <dimen name="fab_margin">48dp</dimen>
 </resources>
diff --git a/CredentialManager/app/src/main/res/values/colors.xml b/CredentialManager/app/src/main/res/values/colors.xml
index f4b5235..891b453 100644
--- a/CredentialManager/app/src/main/res/values/colors.xml
+++ b/CredentialManager/app/src/main/res/values/colors.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
diff --git a/CredentialManager/app/src/main/res/values/dimens.xml b/CredentialManager/app/src/main/res/values/dimens.xml
index 59a0b0c..805dfef 100644
--- a/CredentialManager/app/src/main/res/values/dimens.xml
+++ b/CredentialManager/app/src/main/res/values/dimens.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <dimen name="fab_margin">16dp</dimen>
 </resources>
diff --git a/CredentialManager/app/src/main/res/values/strings.xml b/CredentialManager/app/src/main/res/values/strings.xml
index 887de2d..f9dbd19 100644
--- a/CredentialManager/app/src/main/res/values/strings.xml
+++ b/CredentialManager/app/src/main/res/values/strings.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <string name="app_name">CredentialManagerSample</string>
     <string name="action_settings">Settings</string>
@@ -9,4 +25,4 @@
 
     <string name="hello_first_fragment">Hello first fragment</string>
     <string name="hello_second_fragment">Hello second fragment. Arg: %1$s</string>
-</resources>
\ No newline at end of file
+</resources>
diff --git a/CredentialManager/app/src/main/res/values/themes.xml b/CredentialManager/app/src/main/res/values/themes.xml
index 3181e19..fc1420c 100644
--- a/CredentialManager/app/src/main/res/values/themes.xml
+++ b/CredentialManager/app/src/main/res/values/themes.xml
@@ -1,3 +1,19 @@
+<!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <resources>
     <!-- Base application theme. -->
     <style name="Theme.CredentialManagerSample" parent="Theme.MaterialComponents.DayNight.NoActionBar">
diff --git a/CredentialManager/app/src/main/res/xml/backup_rules.xml b/CredentialManager/app/src/main/res/xml/backup_rules.xml
index 148c18b..f507eaf 100644
--- a/CredentialManager/app/src/main/res/xml/backup_rules.xml
+++ b/CredentialManager/app/src/main/res/xml/backup_rules.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<!--
    Sample backup rules file; uncomment and customize as necessary.
    See https://developer.android.com/guide/topics/data/autobackup
    for details.
diff --git a/CredentialManager/app/src/main/res/xml/data_extraction_rules.xml b/CredentialManager/app/src/main/res/xml/data_extraction_rules.xml
index 0c4f95c..c9acde7 100644
--- a/CredentialManager/app/src/main/res/xml/data_extraction_rules.xml
+++ b/CredentialManager/app/src/main/res/xml/data_extraction_rules.xml
@@ -1,4 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2023 Google LLC
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<!--
    Sample data extraction rules file; uncomment and customize as necessary.
    See https://developer.android.com/about/versions/12/backup-restore#xml-changes
    for details.
diff --git a/CredentialManager/build.gradle b/CredentialManager/build.gradle
index 23f0d5e..87d3b66 100644
--- a/CredentialManager/build.gradle
+++ b/CredentialManager/build.gradle
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 buildscript {
     repositories {
         // Make sure that you have the following two repositories
diff --git a/CredentialManager/gradle.properties b/CredentialManager/gradle.properties
index 5a794ad..7c94f39 100644
--- a/CredentialManager/gradle.properties
+++ b/CredentialManager/gradle.properties
@@ -1,3 +1,19 @@
+#
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # Project-wide Gradle settings.
 
 # IDE (e.g. Android Studio) users:
@@ -26,4 +42,4 @@ kotlin.code.style=official
 # Enables namespacing of each library's R class so that its R class includes only the
 # resources declared in the library itself and none from the library's dependencies,
 # thereby reducing the size of the R class for that library
-android.nonTransitiveRClass=true
\ No newline at end of file
+android.nonTransitiveRClass=true
diff --git a/CredentialManager/keystore.properties b/CredentialManager/keystore.properties
index 3d38a8a..2b99787 100644
--- a/CredentialManager/keystore.properties
+++ b/CredentialManager/keystore.properties
@@ -1,3 +1,19 @@
+#
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 storePassword=android
 keyPassword=android
 keyAlias=androiddebugkey
diff --git a/CredentialManager/settings.gradle b/CredentialManager/settings.gradle
index 5cee9d5..939e7f4 100644
--- a/CredentialManager/settings.gradle
+++ b/CredentialManager/settings.gradle
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 pluginManagement {
     repositories {
         gradlePluginPortal()