title: AB testing config applied but firebase console show 0 users
body: <p>I've configured firebase ab-testing. Everything works fine except there is no impact user on console.</p>
  
  <p>Actually, I can see UI and log show ab-testing is applied.
  Moreover, by checking the other StackoverFlow topic, activateFetched also invoked after fetch successfully.</p>
  
  <p>Moreover, I've referenced </p>
  
  <ol>
  <li><a href="https://stackoverflow.com/questions/49311141/firebase-remote-config-a-b-testing-shows-no-results-after-24-hours">Firebase Remote Config A/B testing shows no results after 24 hours</a></li>
  <li><a href="https://stackoverflow.com/questions/48629338/firebase-remote-config-results-on-initial-request">Firebase Remote Config results on initial request</a></li>
  <li><a href="https://stackoverflow.com/questions/47348836/remote-config-a-b-test-does-not-provide-results-on-ios?rq=1">Remote Config A/B Test does not provide results on iOS</a></li>
  </ol>
  
  <p>But those are no work on my case.
  Is there anything miss or any other need to check so that client can response AB testing result to firebase console.</p>
  
  <p>Thanks for your help first.</p>
  
  <p>Code snippet:</p>
  
  <pre><code>    [FIRApp configure];
  
      FIRRemoteConfigSettings* configSettings = [[remoteConfig configSettings] initWithDeveloperModeEnabled:YES];
      [[FIRRemoteConfig remoteConfig] setConfigSettings:configSettings];
  
      [[FIRRemoteConfig remoteConfig] fetchWithExpirationDuration:duration completionHandler:^(FIRRemoteConfigFetchStatus status, NSError *error) {
  
          if (status == FIRRemoteConfigFetchStatusSuccess) {
              BOOL configFound = [[FIRRemoteConfig remoteConfig]  activateFetched];
  </code></pre>