Create API Rest with Laravel 7.X Passport Authentication And Implement Refresh Token (Part 1)

you can find the newer article about this in here

Step 1. Install Laravel

With this command we install laravel

laravel new website

Step 2. Install Laravel Passport Package And Guzzle

Laravel Passport provides a full OAuth2 server implementation

composer require laravel/passport
composer require guzzlehttp/guzzle
composer require symfony/psr-http-message-bridge

Step 3. Run These Commands For Fixing Storage Permission

sudo chown -R $USER:www-data storage
sudo chmod -R 775 storage

Step 4. Run Migration

Create the tables that your application needs to store clients and access tokens

php artisan migrate

Step 5. Generate keys

With this commend you create "personal access" and "password grant" that you need them for generating access tokens

php artisan passport:install

Step 6. Add Trait To User Class

There are some helper functions in this trait

<?php
namespace App;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Laravel\Passport\HasApiTokens;class User extends Authenticatable #chenged
{
    use Notifiable, HasApiTokens; #changed
...

Step 6. Call Passport Routes And Add Some Configs

call the Passport::routes method within the boot method of your AuthServiceProvider and change the token life time like this

<?php

namespace App\Providers;

use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Gate;
use Laravel\Passport\Passport;
use Carbon\Carbon;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies = [
        // 'App\Model' => 'App\Policies\ModelPolicy',
    ];

    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->registerPolicies();
        Passport::routes();
        Passport::tokensExpireIn(Carbon::now()->addDays(1));
        Passport::refreshTokensExpireIn(Carbon::now()->addDays(10));
    }
}

Step 7. Finally You Need To Change The Api Driver

you need change api drive in config/auth.php like this

'guards' => [
    'web' => [
        'driver' => 'session',
        'provider' => 'users',
    ],
    'api' => [
        'driver' => 'passport',
        'provider' => 'users',
    ],
],

Step 8. Create api route

<?php

use Illuminate\Support\Facades\Route;

Route::post('login', 'UserController@login');
Route::post('register', 'UserController@register');

Step 9. Create controller

php artisan make:controller UserController

Step 10. Complete the controller

<?php

namespace App\Http\Controllers;

use App\User; 
use Validator;
use Exception;
use GuzzleHttp\Client;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth; 
use Laravel\Passport\Client as OClient; 

class UserController extends Controller
{
    public $successStatus = 200;

    public function login() { 
        if (Auth::attempt(['email' => request('email'), 'password' => request('password')])) { 
            $oClient = OClient::where('password_client', 1)->first();
            return $this->getTokenAndRefreshToken($oClient, request('email'), request('password'));
        } 
        else { 
            return response()->json(['error'=>'Unauthorised'], 401); 
        } 
    }

    public function register(Request $request) { 
        $validator = Validator::make($request->all(), [ 
            'name' => 'required', 
            'email' => 'required|email|unique:users', 
            'password' => 'required', 
            'c_password' => 'required|same:password', 
        ]);

        if ($validator->fails()) { 
            return response()->json(['error'=>$validator->errors()], 401);            
        }

        $password = $request->password;
        $input = $request->all(); 
        $input['password'] = bcrypt($input['password']); 
        $user = User::create($input); 
        $oClient = OClient::where('password_client', 1)->first();
        return $this->getTokenAndRefreshToken($oClient, $user->email, $password);
    }

    public function getTokenAndRefreshToken(OClient $oClient, $email, $password) { 
        $oClient = OClient::where('password_client', 1)->first();
        $http = new Client;
        $response = $http->request('POST', 'http://mylemp-nginx/oauth/token', [
            'form_params' => [
                'grant_type' => 'password',
                'client_id' => $oClient->id,
                'client_secret' => $oClient->secret,
                'username' => $email,
                'password' => $password,
                'scope' => '*',
            ],
        ]);

        $result = json_decode((string) $response->getBody(), true);
        return response()->json($result, $this->successStatus);
    }
}