public function getAuthKey()
    {
        $authKeyAttribute = $this->authKeyAttribute;
        return (is_string($authKeyAttribute) && !empty($authKeyAttribute)) ? $this->$authKeyAttribute : null;
    }
public function getAuthKey()
    {
        $authKeyAttribute = $this->authKeyAttribute;
        return (is_string($authKeyAttribute) && !empty($authKeyAttribute)) ? $this->$authKeyAttribute : null;
    }
public function getAuthKey ( ) { $ authKeyAttribute = $ this -> authKeyAttribute ; return ( is_string ( $ authKeyAttribute ) && ! empty ( $ authKeyAttribute ) ) ? $ this -> $ authKeyAttribute : null ; }
Get auth key.
@return string|null
Get auth key .