Getting errors from Twitter.sharedInstance() Swift 3 iOS 10

Question

I am writing app with Swift 3 on iOS 10. sharedInstance() method throws errors to console when user deny permissions to account from systems or account is not configured (e.g. "Unable to authenticate using the system account"). Errors are shows on console before enter to closure. I wont shows this errors to users in app e.g. on alert. This is my code:

  Twitter.sharedInstance().logIn { (session, error) in
                if error != nil {
                //   print(error?.localizedDescription ?? "    ")
                    return
                })

I get this error:

2016-11-29 14:49:09.023 CarReview[1254:31719] [TwitterKit] did encounter error with message "Unable to authenticate using the system account.": Error Domain=TWTRLogInErrorDomain Code=2 "User allowed permission to system accounts but there were none set up." UserInfo={NSLocalizedDescription=User allowed permission to system accounts but there were none set up.}
2016-11-29 14:49:09.024 CarReview[1254:31719] [TwitterKit] No matching scheme found.
2016-11-29 14:49:09.292 CarReview[1254:31719] [TwitterKit] did encounter error with message "Error obtaining user auth token.": Error Domain=TWTRLogInErrorDomain Code=-1 "<?xml version="1.0" encoding="UTF-8"?>
<hash>
  <error>Desktop applications only support the oauth_callback value 'oob'</error>
  <request>/oauth/request_token</request>
</hash>
" UserInfo={NSLocalizedDescription=<?xml version="1.0" encoding="UTF-8"?>
<hash>
  <error>Desktop applications only support the oauth_callback value 'oob'</error>
  <request>/oauth/request_token</request>
</hash>
}

I want show users this: "Unable to authenticate using the system account. User allowed permission to system accounts but there were none set up."

Answer 1

I am facing the same issue as in the question. I have just set the callBack Url into the Twitter App and resolved the issues.

Go to https://apps.twitter.com/app -> Settings -> Callback URL and Update Settings to save.