UsersController.php

<?php

namespace App\Http\Controllers\API;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

class UsersController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth:api');
    }

    /**
     * Return the API Authenticated User
     */
    public function show(Request $request)
    {
        return $request->user();
    }
}