Where is user session Parse store

Login code:

[PFUser logInWithUsernameInBackground:self.userTextField.text password:self.passwordTextField.text block:^(PFUser *user, NSError *error) {
    if (user) {
        [self performSegueWithIdentifier:@"LoginSuccesful" sender:self];
    }
    else {
        NSInteger code = [error code];
        NSString *message;
        if (code == 100) {
            message = @"No Internet Connection";
        }
        else if(code == 101) {
            message = @"Wrong credentials";
        }

        UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:@"Error" message:message delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
        [errorAlertView show];
    }
}];

      

        
        
        
      

    

We can check if the user is registered or not with

if ([PFUser currentUser]) { 
    // user is logged
}

      

        
        
        
      

    

This means that PFUser logInWithUsernameInBackground: password: downloads user data and stores it somewhere in iOS, I don't know if it's in a plist or another file, or maybe in a session.

Where does Parse Framework store iOS user login session?