liwo/app/Providers/AuthServiceProvider.php

<?php

namespace App\Providers;

use App\Fingerprint;
use App\Utilities\RequestMixin;
use App\Utilities\BusinessInfoRequestMixin;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;

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

    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->registerPolicies();

        $this->app['request']->mixin(new RequestMixin);
        $this->app['request']->mixin(new BusinessInfoRequestMixin);

        $this->app['auth']->viaRequest('api', function ($request) {
            if ($request->bearerToken() === null) {
                return null;
            }

            $fingerprint = Fingerprint::where([
                'token' => $request->bearerToken(),
                'agent' => $request->getAgent(),
                'os' => $request->getOS(),
            ])->first();

            return $fingerprint->user->setAttribute('token', $fingerprint->token);
        });
    }
}