title: Twitter API application only mode authentication
body: <p>I've tried to integrate the STTwitter framework (Github project) for interacting with the Twitter API 1.1. </p>
  
  <p>After I've create an app in my dev account, I've used the OAuth credentials for application only mode authentication. Anyway, I get the following error and I don't know how to fix it: <strong>Error Domain=STTwitterTwitterErrorDomain Code=220 "Your credentials do not allow access to this resource"</strong></p>
  
  <pre><code>STTwitterAPI *twitter = [STTwitterAPI twitterAPIWithOAuthConsumerKey:@"XXX"
                                               consumerSecret:@"XXX"];
  [twitter verifyCredentialsWithSuccessBlock:^(NSString *bearerToken) {
  
      NSLog(@"Access granted with %@", bearerToken);
  
  
  } errorBlock:^(NSError *error) {
      NSLog(@"-- error %@", error);
  }];
  </code></pre>
  
  <p>Does anyone have a clue how to fix it?</p>