jandl-taskmanager-app/be/app/Http/Controllers/TeamController.php

<?php

namespace App\Http\Controllers;

use App\Models\Team;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class TeamController extends Controller
{

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('api');
    }

    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'data.name' => 'required',
            'data.employees' => 'required',
        ]);

        if($validator->fails()){
            return response()->json($validator->errors(), 400);
        }

        $userIdsArray = array_column($request->all()['data']['employees'], 'id');

        $team = Team::create($request->all()['data']);
        $team->users()->attach( $userIdsArray );

        return response()->json([
            'message' => 'Team created successfully',
            'team' => $team
        ], 201);
    }
}