ios code utilizing getSessionToken Coud Code (fVLQr302)

//gUser is the instance of GIDGoogleUser who has successfully signed in

NSString *gClientId = [GGLContext sharedInstance].configuration.clientID;
        [PFCloud callFunctionInBackground:@"getSessionToken"
                           withParameters:@{@"idToken":guser.authentication.idToken,
                                            @"GClientId":gClientId}
                                    block:^(NSString *sessionToken, NSError * _Nullable error) {
                                        assert(!error);
                                        assert(sessionToken);
                                        [PFUser becomeInBackground:sessionToken
                                                             block:^(PFUser * _Nullable user, NSError * _Nullable error) {
                                                                 assert(!error);

                                                                 [self.busyIndicator stopAnimating];

                                                                 //Jump to Main Screen
                                                                 [self moveToMainScreen];
                                                             }];
                                    }];