fix(auth,core): Added auth userpool endpoint into AmplifyOutputs mapping

packages/amplify_core/lib/src/config/amplify_outputs/auth/auth_outputs.dart

@@ -20,6 +20,7 @@ class AuthOutputs
     required this.awsRegion,
     this.userPoolId,
     this.userPoolClientId,
+    this.userPoolEndpoint,
     this.appClientSecret,
     this.identityPoolId,
     this.passwordPolicy,
@@ -44,6 +45,9 @@ class AuthOutputs
   /// The Cognito User Pool Client ID.
   final String? userPoolClientId;
 
+  /// The Cognito User Pool Endpoint.
+  final String? userPoolEndpoint; //Gen 1 only
+
   /// A fixed string that must be used in all API requests to the app client
   /// if the the app client has one configured.
   ///
@@ -84,6 +88,7 @@ class AuthOutputs
         awsRegion,
         userPoolId,
         userPoolClientId,
+        userPoolEndpoint,
         identityPoolId,
         oauth,
         standardRequiredAttributes,

packages/amplify_core/lib/src/config/auth/auth_config.dart

@@ -137,6 +137,7 @@ class AuthConfig extends AmplifyPluginConfigMap {
       awsRegion: region,
       userPoolId: userPool?.poolId,
       userPoolClientId: userPool?.appClientId,
+      userPoolEndpoint: userPool?.endpoint,
       appClientSecret: userPool?.appClientSecret,
       identityPoolId: identityPool?.poolId,
       passwordPolicy: passwordPolicy,

packages/auth/amplify_auth_cognito_dart/lib/src/state/machines/configuration_state_machine.dart

@@ -76,6 +76,7 @@ final class ConfigurationStateMachine
         region: authOutputs.awsRegion,
         credentialsProvider: _credentialsProvider,
         dependencyManager: this,
+        endpoint: authOutputs.userPoolEndpoint,
       ),
     );