How to check is user is Online through API

I have this in my Middleware

			  public function handle($request, Closure $next)
{

    if(Auth::check()){
        $expiresAt = Carbon::now()->addMinutes(1); // keep online for 1 min
        Cache::put('user_is_Online' . Auth::user()->id, true, $expiresAt);
        // last seen
        User::where('id', Auth::user()->id)->update(['last_seen' => now()]);
    }

    return $next($request);
			}

and this in my USER model

			public function isOnline(){

 return Cache::has('user_is_Online'.$this->id);

									}

how do i return all users wether online or not and add a value to identify online users from offline users using api

		 public function getusers($msg){
    $users = User::withBasic()->where('usertype_id' , 4)->orderBy('created_at' , 'DESC')->paginate(12);
     return response()->json([
        'res' => $users,
        'message'=>$msg,
        'status' => 200
    ], 200);
 }