SettingsController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class SettingsController extends Controller
{

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

    public function updateUser(Request $request)
    {
        $this->validate($request, [
            'name' => 'required|max:255',
            'email' => 'required|email|max:255|unique:users,email,' . $request->user()->id,
        ]);

        $request->user()->update([
            'name' => $request->name,
            'email' => $request->email,
        ]);

        return response()->json($request->user()->toArray());
    }
}