reauthenticateWithPopup method
Reauthenticates a user with the specified provider using
a pop-up based OAuth flow.
It returns the UserCredential
information if reauthentication is successful.
Implementation
Future<UserCredential> reauthenticateWithPopup(AuthProvider provider) =>
handleThenable(jsObject.reauthenticateWithPopup(provider.jsObject))
.then((u) => UserCredential.fromJsObject(u));