public function checkToken($jwt, $getIdentity = false){
        $auth = false;

     try{
         $decoded = JWT::decode($jwt, $this->key, array('HS256'));
     }catch(UnexpectedValueException $e){
         $auth = false;
     }catch(DomainException $e){
         $auth = false;
     }

     if(is_object($decoded) && isset($decoded->sub)){
         $auth = true;
     }else{
         $auth = false;
     }

     if($getIdentity){
         return $decoded;
     }

     return $auth;
}

if(is_object($decoded) && isset($decoded->sub)){
    $auth = true;
}else{
    $auth = false;
}