fix(cognitoauth): forward lambda trigger exception for social sign in (#3002)

Author: eeatonaws

aws-android-sdk-cognitoauth/src/main/java/com/amazonaws/mobileconnectors/cognitoauth/AuthClient.java

@@ -92,6 +92,11 @@ public class AuthClient {
      */
     private static final long REDIRECT_TIMEOUT_SECONDS = 10;
 
+    /**
+     * Message returned for a bad request.
+     */
+    private static final String BAD_REQUEST_ERROR = "invalid_request";
+
     /**
      * Android application context.
      */
@@ -450,10 +455,17 @@ public void run() {
                             uri.getQueryParameter(ClientConstants.DOMAIN_QUERY_PARAM_ERROR);
 
                     if (errorText != null) {
+                        final String errorDescription = uri.getQueryParameter(ClientConstants.DOMAIN_QUERY_PARAM_ERROR_DESCRIPTION);
+                        final String errorMessage;
+                        if (errorText.equals(BAD_REQUEST_ERROR) && errorDescription != null) {
+                            errorMessage = errorDescription.trim();
+                        } else {
+                            errorMessage = errorText;
+                        }
                         returnCallback = new Runnable() {
                             @Override
                             public void run() {
-                                callback.onFailure(new AuthServiceException(errorText));
+                                callback.onFailure(new AuthServiceException(errorMessage));
                             }
                         };
                     } else {

aws-android-sdk-cognitoauth/src/main/java/com/amazonaws/mobileconnectors/cognitoauth/util/ClientConstants.java

@@ -38,6 +38,7 @@ public abstract class ClientConstants {
     public static final String DOMAIN_QUERY_PARAM_CODE_CHALLENGE_METHOD_SHA256 = "S256";
     public static final String DOMAIN_QUERY_PARAM_CODE_VERIFIER = "code_verifier";
     public static final String DOMAIN_QUERY_PARAM_ERROR = "error";
+    public static final String DOMAIN_QUERY_PARAM_ERROR_DESCRIPTION = "error_description";
     public static final String DOMAIN_QUERY_PARAM_REDIRECT_URI = "redirect_uri";
     public static final String DOMAIN_QUERY_PARAM_LOGOUT_URI = "logout_uri";
     public static final String DOMAIN_QUERY_PARAM_RESPONSE_TYPE = "response_type";