C:\Users\User\flutter.pub-cache\hosted\pub.dartlang.org\firebase_auth-0.11.1+10\android\src\main\java\io\flutter\plugins\firebaseauth\FirebaseAuthPlugin.java:9: error: cannot find symbol
import androidx.annotation.NonNull;
^
symbol: class NonNull
location: package androidx.annotation
C:\Users\User\flutter.pub-cache\hosted\pub.dartlang.org\firebase_auth-0.11.1+10\android\src\main\java\io\flutter\plugins\firebaseauth\FirebaseAuthPlugin.java:10: error: cannot find symbol
import androidx.annotation.Nullable;
^