This is a simple example to show a Lumen App (API) which works with Laravel Passport (OAuth 2.0).

It uses service provider from : https://github.com/dusterio/lumen-passport

Clone this repository. Run the following commands:

$ cd lumen-passport-api
$ cp .env.example .env
$ php artisan key:generate

Create your database and enter the details in your .env file. Now run the following commands:

$ php artisan migrate --seed
$ php artisan passport:install

You will get this set of messages:

Encryption keys generated successfully.
Personal access client created successfully.
Client ID: 1
Client Secret: aW1qHacErLrFquQfjoAuVIO0cWnlKNXM5LDhXjLi
Password grant client created successfully.
Client ID: 2
Client Secret: dYl1Fgom4LjdkOkvZmhhSMdFDZGQLVnapFokWtMW

You should see two client ID and secret pairs. The first one is Personal Access Client and second one is Password Grant Client. The Password Grant Client will allow us to generate new tokens for users.

We have already added two users in UsersTableSeeder.php. Their credentials are:

name : Heisenberg
email : heisenberg@breakingbad.com
password : crystal_meth

name : Jesse Pinkman
email : Jesse@breakingbad.com
password : chilli_powder

curl -X POST \
  http://127.0.0.1:8000/oauth/token \
  -H 'accept: application/json' \
  -H 'cache-control: no-cache' \
  -H 'content-type: multipart/form-data; \
  -F client_id=2 \
  -F client_secret=dYl1Fgom4LjdkOkvZmhhSMdFDZGQLVnapFokWtMW \
  -F grant_type=password \
  -F username=jesse@breakingbad.com \
  -F password=chilli_powder

Thus, we will get a response which has access token,

 {
    "token_type": "Bearer",
    "expires_in": 31536000,
    "access_token": "VeryVeryVeryLongAccessToken",
    "refresh_token": "YourRefreshToken"
}

Finally, we can access secure api endpoint /api/element:

curl -X GET \
  http://127.0.0.1:8000/api/element \
  -H 'authorization: Bearer VeryVeryVeryLongAccessToken' \

Response:

[
    {
        "atomic_number": 1,
        "name": "Hydrogen",
        "symbol": "H"
    },
    {
        "atomic_number": 2,
        "name": "Helium",
        "symbol": "He"
    },
    {
        "atomic_number": 6,
        "name": "Carbon",
        "symbol": "C"
    },
    {
        "atomic_number": 7,
        "name": "Nitrogen",
        "symbol": "N"
    },
    {
        "atomic_number": 8,
        "name": "Oxygen",
        "symbol": "O"
    }
]

MIT License.