Update packages/firebase_vertexai/firebase_vertexai/lib/src/error.dart

Co-authored-by: Nate Bosch <[email protected]>

packages/firebase_vertexai/firebase_vertexai/lib/src/error.dart

@@ -56,14 +56,14 @@ final class ServiceApiNotEnabled implements VertexAIException {
       'The Vertex AI in Firebase SDK requires the Vertex AI in Firebase API '
       '(`firebasevertexai.googleapis.com`) to be enabled in your Firebase project. Enable this API '
       'by visiting the Firebase Console at '
-      'https://console.firebase.google.com/project/${_getID()}/genai '
+      'https://console.firebase.google.com/project/$_id/genai '
       'and clicking "Get started". If you enabled this API recently, wait a few minutes for the '
       'action to propagate to our systems and then retry.';
 
   @override
   String toString() => message;
 
-  String _getID() {
+  String get _id {
     return _projectId.replaceAll('projects/', '');
   }
 }