autocde2.0/app/Http/Controllers/API/UserController.php

<?php

namespace App\Http\Controllers\API;

use App\Http\Controllers\Controller;
use App\Http\Resources\API\UserInfoResource;
use App\Models\Role;
use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class UserController extends Controller
{
    public function info()
    {
        $user = Auth::user();

        return new UserInfoResource($user);
    }

    public function assignRole(Request $request, string $id)
    {
        $user = User::query()->findOrFail($id);

        $roleName = $request->get('role_name');
        if ($roleName) {
            $role = Role::query()->where("guard_name", "api")->where('name', $roleName)->firstOrFail();
            $user->role_id = $role->id;
            $user->save();
        }

        $roles = $roleName ? [$roleName] : [];

        $user->syncRoles($roles);

        return $this->noContent();
    }

    public function index(){
        $user = User::all();
        return $user;
    }
}