Install via composer

Run the following command to pull in the latest version:

composer require tymon/jwt-auth

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Copy the config

Copy the config file from vendor/tymon/jwt-auth/config/config.php to config folder of your Lumen application and rename it to jwt.php

Register your config by adding the following in the bootstrap/app.php before middleware declaration.

$app->configure('jwt');

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Bootstrap file changes

Add the following snippet to the bootstrap/app.php file under the providers section as follows:

// Uncomment this line
$app->register(App\Providers\AuthServiceProvider::class);

// Add this line
$app->register(Tymon\JWTAuth\Providers\LumenServiceProvider::class);

Then uncomment the auth middleware in the same file:

$app->routeMiddleware([
    'auth' => App\Http\Middleware\Authenticate::class,
]);

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Generate secret key

I have included a helper command to generate a key for you:

php artisan jwt:secret

This will update your .env file with something like JWT_SECRET=foobar

It is the key that will be used to sign your tokens. How that happens exactly will depend on the algorithm that you choose to use.