Fix possible infinite loading

Signed-off-by: Alex Saveau <[email protected]>

Author: SUPERCILEX

auth/src/main/java/com/firebase/ui/auth/util/data/ProviderUtils.java

@@ -84,7 +84,7 @@ public static String signInMethodToProviderId(@NonNull String method) {
             case EmailAuthProvider.EMAIL_LINK_SIGN_IN_METHOD:
                 return EmailAuthProvider.PROVIDER_ID;
             default:
-                throw new IllegalStateException("Unknown method: + " + method);
+                throw new IllegalStateException("Unknown method: " + method);
         }
     }
 

auth/src/main/java/com/firebase/ui/auth/viewmodel/idp/EmailProviderResponseHandler.java

@@ -57,7 +57,13 @@ public void onFailure(@NonNull Exception e) {
                             // Collision with existing user email, it should be very hard for
                             // the user to even get to this error due to CheckEmailFragment.
                             ProviderUtils.fetchTopProvider(getAuth(), email)
-                                    .addOnSuccessListener(new StartWelcomeBackFlow(email));
+                                    .addOnSuccessListener(new StartWelcomeBackFlow(email))
+                                    .addOnFailureListener(new OnFailureListener() {
+                                        @Override
+                                        public void onFailure(@NonNull Exception e) {
+                                            setResult(Resource.<IdpResponse>forFailure(e));
+                                        }
+                                    });
                         } else {
                             setResult(Resource.<IdpResponse>forFailure(e));
                         }