title: It is impossible to delete a user from firebase
body: <p>I am developing an application in which I want add a function to remove a user from Firebase. I follow the official documentation but I can not do it. I get a warning in the console </p>
  
  <blockquote>
    <p>Error This operation is sensitive and requires recent authentication. Log in again before retrying this request.</p>
  </blockquote>
  
  <p>Here is my code:</p>
  
  <pre><code>- (void)deleteUser {
     FIRUser *user = [FIRAuth auth].currentUser;
     [user deleteWithCompletion:^(NSError *_Nullable error) {
        if (error) {
            NSLog(@"Error %@", error.localizedDescription);
        } else {
            NSLog(@"Delete user");
        }
     }];
  </code></pre>
  
  <p>}</p>
  
  <p>Perhaps somebody faced a similar problem, tell me how to solve?"</p>