Login user then connect to chat

login.m

- (void) loginForMessaging:(NSString *)username andPassword:(NSString *)password withCompletion:(void (^)(BOOL finished))completion {
    __weak __typeof(self)weakSelf = self;
    [QBRequest logInWithUserLogin:username password:password successBlock:^(QBResponse *response, QBUUser *user) {
        if (user) {
            __typeof(self) strongSelf = weakSelf;
            [[QBChat instance] connectWithUser:user completion:^(NSError * _Nullable error) {
                if (!error) {
                    [strongSelf registerForRemoteNotifications];
                    completion(true);
                } else {
                    [SVProgressHUD showInfoWithStatus:@"error connecting to chat"];
                }
            }];
        }
    } errorBlock:^(QBResponse *response) {
        // error handling
        NSLog(@"error: %@", response.error);
        completion(false);
    }];
}