example from if-firebase-auth

check_temp_password

login: function(user) {
  return $q(function(resolve, reject) {
      BACKEND.authWithPassword(user, function(error, authData) {
          if (error === null) {
              // user authenticated with Firebase
              getUserData(authData);
              temporaryPassword = authData.password.isTemporaryPassword;
              authServiceError = {};
              resolve('logged in');
          } else {
              authServiceError = error;
              reject(error);
          }
      });
  });
},

I had not seen "authData.password.isTemporaryPassword" before in the Firebase Docs. Found it not in the API but in the guide: https://www.firebase.com/docs/web/guide/login/password.html