src/ApiServiceProvider.php
protected function registerToken()
    {
        $this->app->singleton('api.token', function ($app) {
            return new Token($app['api.client']);
        });

        $this->app->alias('api.token', Token::class);
    }
protected function registerToken()
    {
        $this->app->singleton('api.token', function ($app) {
            return new Token($app['api.client']);
        });

        $this->app->alias('api.token', Token::class);
    }
Register the Token singleton.

@return void