fetchSignInMethodsForEmail(String) and other in FirebaseAuth has been deprecated

[chegmarco1989]

Hello.

Running flutter run I get these following of errors:

PS C:\Users\useru\Downloads\flutter_app> flutter run    
Launching lib\main.dart on sdk gphone64 x86 64 in debug mode...
C:\Users\useru\AppData\Local\Pub\Cache\hosted\pub.dev\firebase_auth-5.5.4\android\src\main\java\io\flutter\plugins\firebase\auth\FlutterFirebaseAuthPlugin.java:474: warning: [deprecation] fetchSignInMethodsForEmail(String) in FirebaseAuth has been deprecated
        .fetchSignInMethodsForEmail(email)
        ^
C:\Users\useru\AppData\Local\Pub\Cache\hosted\pub.dev\firebase_auth-5.5.4\android\src\main\java\io\flutter\plugins\firebase\auth\FlutterFirebaseAuthUser.java:343: warning: [deprecation] updateEmail(String) in FirebaseUser has been deprecated
        .updateEmail(newEmail)
        ^
C:\Users\useru\AppData\Local\Pub\Cache\hosted\pub.dev\firebase_auth-5.5.4\android\src\main\java\io\flutter\plugins\firebase\auth\PigeonParser.java:258: warning: [deprecation] setDynamicLinkDomain(String) in Builder has been deprecated
      builder.setDynamicLinkDomain(pigeonActionCodeSettings.getDynamicLinkDomain());
             ^
3 warnings

Please, I need help to fix them.