diff --git a/src/main/java/jp/ne/paypay/auth/HmacAuth.java b/src/main/java/jp/ne/paypay/auth/HmacAuth.java
index 81a8060..1bbc098 100644
--- a/src/main/java/jp/ne/paypay/auth/HmacAuth.java
+++ b/src/main/java/jp/ne/paypay/auth/HmacAuth.java
@@ -69,10 +69,20 @@ private  byte[]  getHmacData(String nonce, long epoch, String hash){
             localContentType = this.contentType;
         }
         String  DELIMITER = "\n";
-        return (this.requestUrl + DELIMITER + this.httpMethod + DELIMITER + nonce + DELIMITER + epoch + DELIMITER
+        return (formatRequestUrl(this.requestUrl) + DELIMITER + this.httpMethod + DELIMITER + nonce + DELIMITER + epoch + DELIMITER
                 + localContentType + DELIMITER + hash)
                 .getBytes(StandardCharsets.UTF_8);
     }
+    private String formatRequestUrl(String requestUrl){
+        try{
+            if(requestUrl.contains("?")){
+                return requestUrl.substring(0, requestUrl.indexOf("?"));
+            }
+        }catch (Exception e){
+            System.out.println("Exception while formatting request url for HMAC Auth");
+        }
+        return requestUrl;
+    }
     @Override
     public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams) {
         if (apiKey == null ||  apiSecretKey == null) {
@@ -84,7 +94,6 @@ public void applyToParams(List<Pair> queryParams, Map<String, String> headerPara
         }catch (Exception e){
             System.err.println("Error in getting Authorization: "+e);
         }
-
     }
 
     public String getApiKey() {
diff --git a/src/main/java/jp/ne/paypay/example/UserApiExample.java b/src/main/java/jp/ne/paypay/example/UserApiExample.java
new file mode 100644
index 0000000..ed992a8
--- /dev/null
+++ b/src/main/java/jp/ne/paypay/example/UserApiExample.java
@@ -0,0 +1,42 @@
+package jp.ne.paypay.example;
+
+import jp.ne.paypay.ApiClient;
+import jp.ne.paypay.ApiException;
+import jp.ne.paypay.Configuration;
+import jp.ne.paypay.api.UserApi;
+import jp.ne.paypay.model.NotDataResponse;
+import jp.ne.paypay.model.UserAuthorizationStatus;
+
+public class UserApiExample {
+
+
+  public static void main(String[] args) throws ApiException {
+    ApiClient apiClient = new Configuration().getDefaultApiClient();
+    apiClient.setProductionMode(false);
+    apiClient.setApiKey("API_KEY");
+    apiClient.setApiSecretKey("API_SECRET_KEY");
+    apiClient.setAssumeMerchant("ASSUME_MERCHANT_ID");
+    String userAuthorizationId = "USER_AUTHORIZATION_ID";
+
+    UserApi userApi = new UserApi(apiClient);
+
+    getOrUnlinkUser(userAuthorizationId, userApi, false);
+    //Replace the "userAuthorizationId" with the actual one. Please note that this will Unlink the user from the client
+    getOrUnlinkUser("userAuthorizationId", userApi, true);
+  }
+
+  private static void getOrUnlinkUser(String userAuthorizationId, UserApi userApi, boolean unlinkUser) {
+    try{
+      if(unlinkUser){
+        NotDataResponse notDataResponse = userApi.unlinkUser(userAuthorizationId);
+        System.out.println(notDataResponse);
+      }else{
+        UserAuthorizationStatus userAuthorizationStatus = userApi.getUserAuthorizationStatus(userAuthorizationId);
+        System.out.println(userAuthorizationStatus);
+      }
+    }catch (ApiException e){
+      System.out.println(e.getResponseBody());
+    }
+  }
+}
+
diff --git a/src/test/java/jp/ne/paypay/api/HmacAuthTest.java b/src/test/java/jp/ne/paypay/api/HmacAuthTest.java
index 2efde7b..a19828a 100644
--- a/src/test/java/jp/ne/paypay/api/HmacAuthTest.java
+++ b/src/test/java/jp/ne/paypay/api/HmacAuthTest.java
@@ -35,10 +35,15 @@ public void hmacAuthTest(){
         Assert.assertNotNull(hmacAuth.getHttpMethod());
         Assert.assertNotNull(hmacAuth.getRequestBody());
         Assert.assertNotNull(hmacAuth.getRequestUrl());
+        hmacAuth.setRequestUrl("/v2/api/test?param=p1");
+        hmacAuth.applyToParams(queryParams, headerParams);
+        Assert.assertTrue(headerParams.get("Authorization").startsWith("hmac"));
+        hmacAuth.setRequestUrl(null);
+        hmacAuth.applyToParams(queryParams, headerParams);
+        Assert.assertTrue(headerParams.get("Authorization").startsWith("hmac"));
         hmacAuth.setContentType(null);
         headerParams = new HashMap<>();
         hmacAuth.applyToParams(queryParams, headerParams);
         Assert.assertNull(headerParams.get("Authorization"));
-
     }
 }