diff --git a/README.md b/README.md
index f0d23f1..684da9e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Messente API Library
 
 - Messente API version: 2.0.0
-- Java artifact version: 3.0.1
+- Java artifact version: 3.1.0
 
 [Messente](https://messente.com) is a global provider of messaging and user verification services.  * Send and receive SMS, Viber, WhatsApp and Telegram messages. * Manage contacts and groups. * Fetch detailed info about phone numbers. * Blacklist phone numbers to make sure you're not sending any unwanted messages.  Messente builds [tools](https://messente.com/documentation) to help organizations connect their services to people anywhere in the world.
 
@@ -12,7 +12,7 @@ Install Messente API library via Maven, Gradle, Ivy or manual build.
 ### Gradle
 
 ```groovy
-compile "com.messente.api:messente-api:3.0.1"
+compile "com.messente.api:messente-api:3.1.0"
 ```
 
 ### Maven
@@ -21,7 +21,7 @@ compile "com.messente.api:messente-api:3.0.1"
 <dependency>
   <groupId>com.messente.api</groupId>
   <artifactId>messente-api</artifactId>
-  <version>3.0.1</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -29,7 +29,7 @@ compile "com.messente.api:messente-api:3.0.1"
 ### Ivy
 
 ```xml
-<dependency org='com.messente.api' name='messente-api' rev='3.0.1'>
+<dependency org='com.messente.api' name='messente-api' rev='3.1.0'>
   <artifact name='messente-api' ext='pom' ></artifact>
 </dependency>
 ```
@@ -44,7 +44,7 @@ mvn clean package
 
 Install
 
-- `target/messente-api-3.0.1.jar`
+- `target/messente-api-3.1.0.jar`
 - `target/lib/*.jar`
 
 ## Features
diff --git a/api/openapi.yaml b/api/openapi.yaml
index 386b064..fdb228a 100644
--- a/api/openapi.yaml
+++ b/api/openapi.yaml
@@ -152,6 +152,12 @@ paths:
               schema:
                 $ref: '#/components/schemas/ErrorOmnichannel'
           description: Invalid input
+        "401":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorOmnichannel'
+          description: Unauthorized
       summary: Sends an Omnimessage
       tags:
       - Omnimessage
@@ -178,6 +184,12 @@ paths:
               schema:
                 $ref: '#/components/schemas/DeliveryReportResponse'
           description: Delivery report success
+        "401":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorOmnichannel'
+          description: Unauthorized
         "404":
           content:
             application/json:
@@ -210,6 +222,12 @@ paths:
               schema:
                 $ref: '#/components/schemas/EmptyObject'
           description: Scheduled omnimessage successfully cancelled
+        "401":
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorOmnichannel'
+          description: Unauthorized
         "404":
           content:
             application/json:
diff --git a/build.gradle b/build.gradle
index 7ce6ffc..33d3840 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ apply plugin: 'java'
 apply plugin: 'com.diffplug.spotless'
 
 group = 'com.messente.api'
-version = '3.0.1'
+version = '3.1.0'
 
 
 modifyPom {
diff --git a/build.sbt b/build.sbt
index 7bb20ed..c56e880 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ lazy val root = (project in file(".")).
   settings(
     organization := "com.messente.api",
     name := "messente-api",
-    version := "3.0.1",
+    version := "3.1.0",
     scalaVersion := "2.11.4",
     scalacOptions ++= Seq("-feature"),
     javacOptions in compile ++= Seq("-Xlint:deprecation"),
diff --git a/docs/DeliveryReportApi.md b/docs/DeliveryReportApi.md
index 2b71f2d..110cb4f 100644
--- a/docs/DeliveryReportApi.md
+++ b/docs/DeliveryReportApi.md
@@ -72,5 +72,6 @@ public class Example {
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|
 | **200** | Delivery report success |  -  |
+| **401** | Unauthorized |  -  |
 | **404** | If no such message exists or you do not have access to the particular message |  -  |
 
diff --git a/docs/OmnimessageApi.md b/docs/OmnimessageApi.md
index 84d0c88..c58c90f 100644
--- a/docs/OmnimessageApi.md
+++ b/docs/OmnimessageApi.md
@@ -73,6 +73,7 @@ public class Example {
 | Status code | Description | Response headers |
 |-------------|-------------|------------------|
 | **202** | Scheduled omnimessage successfully cancelled |  -  |
+| **401** | Unauthorized |  -  |
 | **404** | If the omnimessage has already been sent or no such message exists |  -  |
 
 <a name="sendOmnimessage"></a>
@@ -141,4 +142,5 @@ public class Example {
 |-------------|-------------|------------------|
 | **201** | Omnimessage success response |  -  |
 | **400** | Invalid input |  -  |
+| **401** | Unauthorized |  -  |
 
diff --git a/pom.xml b/pom.xml
index 6f96cdc..f24a050 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <artifactId>messente-api</artifactId>
     <packaging>jar</packaging>
     <name>messente-api</name>
-    <version>3.0.1</version>
+    <version>3.1.0</version>
     <url>https://github.com/messente/messente-api-java</url>
     <description>Java library for Messente API</description>
     <scm>
diff --git a/src/main/java/com/messente/ApiClient.java b/src/main/java/com/messente/ApiClient.java
index 3dd35b4..ae6899d 100644
--- a/src/main/java/com/messente/ApiClient.java
+++ b/src/main/java/com/messente/ApiClient.java
@@ -131,7 +131,7 @@ private void init() {
         json = new JSON();
 
         // Set default User-Agent.
-        setUserAgent("OpenAPI-Generator/3.0.1/java");
+        setUserAgent("OpenAPI-Generator/3.1.0/java");
 
         authentications = new HashMap<String, Authentication>();
     }
diff --git a/src/main/java/com/messente/api/DeliveryReportApi.java b/src/main/java/com/messente/api/DeliveryReportApi.java
index 2b7513b..ca2cc65 100644
--- a/src/main/java/com/messente/api/DeliveryReportApi.java
+++ b/src/main/java/com/messente/api/DeliveryReportApi.java
@@ -85,6 +85,7 @@ public void setCustomBaseUrl(String customBaseUrl) {
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 200 </td><td> Delivery report success </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If no such message exists or you do not have access to the particular message </td><td>  -  </td></tr>
      </table>
      */
@@ -158,6 +159,7 @@ private okhttp3.Call retrieveDeliveryReportValidateBeforeCall(UUID omnimessageId
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 200 </td><td> Delivery report success </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If no such message exists or you do not have access to the particular message </td><td>  -  </td></tr>
      </table>
      */
@@ -176,6 +178,7 @@ public DeliveryReportResponse retrieveDeliveryReport(UUID omnimessageId) throws
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 200 </td><td> Delivery report success </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If no such message exists or you do not have access to the particular message </td><td>  -  </td></tr>
      </table>
      */
@@ -196,6 +199,7 @@ public ApiResponse<DeliveryReportResponse> retrieveDeliveryReportWithHttpInfo(UU
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 200 </td><td> Delivery report success </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If no such message exists or you do not have access to the particular message </td><td>  -  </td></tr>
      </table>
      */
diff --git a/src/main/java/com/messente/api/OmnimessageApi.java b/src/main/java/com/messente/api/OmnimessageApi.java
index af5b50d..e9d1f83 100644
--- a/src/main/java/com/messente/api/OmnimessageApi.java
+++ b/src/main/java/com/messente/api/OmnimessageApi.java
@@ -86,6 +86,7 @@ public void setCustomBaseUrl(String customBaseUrl) {
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 202 </td><td> Scheduled omnimessage successfully cancelled </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If the omnimessage has already been sent or no such message exists </td><td>  -  </td></tr>
      </table>
      */
@@ -159,6 +160,7 @@ private okhttp3.Call cancelScheduledMessageValidateBeforeCall(UUID omnimessageId
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 202 </td><td> Scheduled omnimessage successfully cancelled </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If the omnimessage has already been sent or no such message exists </td><td>  -  </td></tr>
      </table>
      */
@@ -177,6 +179,7 @@ public Object cancelScheduledMessage(UUID omnimessageId) throws ApiException {
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 202 </td><td> Scheduled omnimessage successfully cancelled </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If the omnimessage has already been sent or no such message exists </td><td>  -  </td></tr>
      </table>
      */
@@ -197,6 +200,7 @@ public ApiResponse<Object> cancelScheduledMessageWithHttpInfo(UUID omnimessageId
      <table summary="Response Details" border="1">
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 202 </td><td> Scheduled omnimessage successfully cancelled </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
         <tr><td> 404 </td><td> If the omnimessage has already been sent or no such message exists </td><td>  -  </td></tr>
      </table>
      */
@@ -218,6 +222,7 @@ public okhttp3.Call cancelScheduledMessageAsync(UUID omnimessageId, final ApiCal
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 201 </td><td> Omnimessage success response </td><td>  -  </td></tr>
         <tr><td> 400 </td><td> Invalid input </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call sendOmnimessageCall(Omnimessage omnimessage, final ApiCallback _callback) throws ApiException {
@@ -290,6 +295,7 @@ private okhttp3.Call sendOmnimessageValidateBeforeCall(Omnimessage omnimessage,
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 201 </td><td> Omnimessage success response </td><td>  -  </td></tr>
         <tr><td> 400 </td><td> Invalid input </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
      </table>
      */
     public OmniMessageCreateSuccessResponse sendOmnimessage(Omnimessage omnimessage) throws ApiException {
@@ -308,6 +314,7 @@ public OmniMessageCreateSuccessResponse sendOmnimessage(Omnimessage omnimessage)
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 201 </td><td> Omnimessage success response </td><td>  -  </td></tr>
         <tr><td> 400 </td><td> Invalid input </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
      </table>
      */
     public ApiResponse<OmniMessageCreateSuccessResponse> sendOmnimessageWithHttpInfo(Omnimessage omnimessage) throws ApiException {
@@ -328,6 +335,7 @@ public ApiResponse<OmniMessageCreateSuccessResponse> sendOmnimessageWithHttpInfo
         <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
         <tr><td> 201 </td><td> Omnimessage success response </td><td>  -  </td></tr>
         <tr><td> 400 </td><td> Invalid input </td><td>  -  </td></tr>
+        <tr><td> 401 </td><td> Unauthorized </td><td>  -  </td></tr>
      </table>
      */
     public okhttp3.Call sendOmnimessageAsync(Omnimessage omnimessage, final ApiCallback<OmniMessageCreateSuccessResponse> _callback) throws ApiException {