public function mention(Request $request)
{
$suggestions = [];
$string = $request->get('string');
$users = User::where('displayName', 'like', $string . '%')->where('id', '<>', Auth::user()->getId())->get();
foreach ($users as $user) {
$suggestions[] = ['id' => $user->getId(), 'displayName' => $user->getDisplayName(), 'profileImage' => $user->profileImage];
}
return XePresenter::makeApi($suggestions);
}