Message: Trying to get property 'id' of non-object

Question

I am facing login error. The admin is able to login but when users try to login this error occurs. enter image description here

My code looks like this

   $data = array(

            '_admin_id'         => $query->id,

            '_admin_name'       => $query->name,

            '_admin_email'      => $query->email,

            '_admin_loggedin'   => TRUE,

            '_admin_status'     => $query->status

        );

        $this->session->set_userdata($data);

Thanks!