Lumen 5.4 Trying to install Entrust error "There are no commands defined in the "vendor" namespace"

I am trying to install using Lumen 5.4 but I keep getting this error There are no commands defined in the "vendor" namespace..

Steps I have taken

1. Add "zizaco/entrust": "5.2.x-dev" to composer.json

2. Add $app->register(Zizaco\Entrust\EntrustServiceProvider::class); too app.php

3. composer update

4. Create this helpers.php file

if ( ! function_exists('config_path'))
{
    /**
     * Get the configuration path.
     *
     * @param  string $path
     * @return string
     */
    function config_path($path = '')
    {
        return app()->basePath() . '/config' . ($path ? '/' . $path : $path);
    }
}

1. Add this to composer.json

        "autoload": {
            "files": [
                "app/helpers.php"
            ]
        }

1. Comment out //$this->bladeDirectives(); in EntrustServiceProvider.php

2. Changed the publish function to

        $this->publishes([
            -            __DIR__.'/../config/config.php' => config_path('entrust.php'),
            +            __DIR__.'/../config/config.php' => app()->basePath() . '/config/entrust.php',
        ]);

1. composer dump-autoload -o

2. php artisan vendor:publish

Error

Fatal error: Call to undefined function Zizaco\Entrust\config_path() in /Users/API/vendor/zizaco/entrust/src/Entrust/EntrustServiceProvider.php on line 31

                                                        
  [Symfony\Component\Debug\Exception\FatalErrorException]  
  Call to undefined function Zizaco\Entrust\config_path()