Error with google play games authentication,Problem with the Firebase login with Google Play

Hi all! I am creating a project with unity 2018.3 using firebase and I have implemented the authentication with Gooogle Play. I have followed all the steps of the official documentation (https://firebase.google.com/docs/auth/unity/play-games?authuser=0). Registering in google play console and registering the game service and establishing the emails of the clients that can use the application (I have not registered the application in google play since according to the documentation it is not necessary and I am still doing tests).

Everything I have configured as explained but at the time of login in the application, with the method Social.localUser.Authenticate ((bool success) but will be the popup window of google play games and automatically closes deolviendo always false.

This is the code that I'm running

 void Start() {
         PlayGamesClientConfiguration config = new PlayGamesClientConfiguration.Builder()
         .RequestServerAuthCode(false /* Don't force refresh */)
         .Build();
 
         PlayGamesPlatform.InitializeInstance(config);
         PlayGamesPlatform.Activate();
         PlayGamesPlatform.DebugLogEnabled = true;
         //SignIn();
     }
 
     public void SignIn() {
         Social.localUser.Authenticate((bool success) =>
         {
             if (success) {
                 t.text = ("ok");
             } else {
                 t.text = ("error");
             }
         });
     }

I have debugged the execution and this is the result of the error that is obtained. (Application is pausing, which disconnects the RTMP client. Leaving room.)

 05-10 18:37:27.515: I/Unity(1241): Starting Auth with token client.
 05-10 18:37:27.515: I/Unity(1241):  
 05-10 18:37:27.515: I/Unity(1241): (Filename: ./Runtime/Export/Debug.bindings.h Line: 45)
 05-10 18:37:33.720: I/Unity(1241):  [Play Games Plugin DLL] 05/10/19 18:37:33 +02:00 DEBUG: Application is pausing, which disconnects the RTMP  client.  Leaving room.
 05-10 18:37:33.720: I/Unity(1241):  
 05-10 18:37:33.720: I/Unity(1241): (Filename: ./Runtime/Export/Debug.bindings.h Line: 45)
 05-10 18:37:33.723: I/Unity(1241):  [Play Games Plugin DLL] 05/10/19 18:37:33 +02:00 DEBUG: Invoking user callback on game thread
 05-10 18:37:33.723: I/Unity(1241):  
 05-10 18:37:33.723: I/Unity(1241): (Filename: ./Runtime/Export/Debug.bindings.h Line: 45)

I have tried all the proposed solutions on similar topics but without any success, I have checked the SHA-1 code of both my keystore and the google API console correspond.

I have tried many things but I can not solve the error. Anyone know what might be happening?

Thank you so much