title: Terminating app while signing up a new user in QuickBlox from ios application
body: <p>While <a href="http://quickblox.com/developers/SimpleSample-users-ios#Signing_Up" rel="nofollow noreferrer">signing up a new user</a>in QuickBlox from ios applicaqtion with login and Password credentials, the app got crashed and the NSLog console shows the error as below,</p>
  
  <blockquote>
    <p><strong>Terminating app due to uncaught exception 'BaseServiceException',
    reason: 'You have missed the authorization call. Please insert
    following code inside your application  [QBRequest
    createSessionWithSuccessBlock:errorBlock:]; Before any other code,
    that uses our service, but after setup credentials.</strong> </p>
  </blockquote>
  
  <pre><code>First throw call stack:(
  0   CoreFoundation                      0x038365e4 __exceptionPreprocess + 180
  1   libobjc.A.dylib                     0x02ca48b6 objc_exception_throw + 44
  2   VideoChat                           0x00028e2f -[QBHTTPConnection generateRequestOperation:forPath:usingMethod:] + 1231
  3   VideoChat                           0x00028092 -[QBConnection executeRequest:forPath:usingMethod:] + 162
  4   VideoChat                           0x0001b049 +[QBRequest(QBAuth) signUp:successBlock:errorBlock:] + 825
  5   VideoChat                           0x0000457d -[AppDelegate application:didFinishLaunchingWithOptions:] + 2077
  6   UIKit                               0x017ff355 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 309
  7   UIKit                               0x017ffb95 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1536
  8   UIKit                               0x018043a8 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824
  9   UIKit                               0x0181887c -[UIApplication handleEvent:withNewEvent:] + 3447
  10  UIKit                               0x01818de9 -[UIApplication sendEvent:] + 85
  11  UIKit                               0x01806025 _UIApplicationHandleEvent + 736
  12  GraphicsServices                    0x03d6b2f6 _PurpleEventCallback + 776
  13  GraphicsServices                    0x03d6ae01 PurpleEventCallback + 46
  14  CoreFoundation                      0x037b1d65 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
  15  CoreFoundation                      0x037b1a9b __CFRunLoopDoSource1 + 523
  16  CoreFoundation                      0x037dc77c __CFRunLoopRun + 2156
  17  CoreFoundation                      0x037dbac3 CFRunLoopRunSpecific + 467
  18  CoreFoundation                      0x037db8db CFRunLoopRunInMode + 123
  19  UIKit                               0x01803add -[UIApplication _run] + 840
  20  UIKit                               0x01805d3b UIApplicationMain + 1225
  21  VideoChat                           0x00004cbd main + 141
  22  libdyld.dylib                       0x033dc725 start + 0)
  </code></pre>
  
  <p>I'm using the below code to create a new user,</p>
  
  <pre><code>[QBRequest createSessionWithSuccessBlock:^(QBResponse *response, QBASession *session) {
      // session created
  } errorBlock:^(QBResponse *response) {
      // handle errors
      NSLog(@"%@", response.error);
  }];
  
  QBUUser *user = [QBUUser user];
  user.password = @"azhhdsf";
  user.login = @"dsfgsgf";
  
  // Registration/sign up of User
  [QBRequest signUp:user successBlock:^(QBResponse *response, QBUUser *user) {
      // Sign up was successful
  } errorBlock:^(QBResponse *response) {
      // Handle error here
      NSLog(@"error while signing up with QB");
  }];
  </code></pre>
  
  <p>I saw an answer <a href="https://stackoverflow.com/a/20593701/756941">here on SO</a>, but it throws an error, that <code>delegate:self</code> was deprecated and need to use the above method <code>signUp: successBlock:</code>.</p>
  
  <p>Did anyone face this issue? How to fix this? Any suggestions would be greatly appreciated.</p>