405 Method Not Allowed - Laravel 5.5 API - Passport help

Hello,

I am struggling with this one.

I have created an API which uses the Laravel 5.5 passport. When I try to communicate with the url: http://Mywebsite.dev/api/register I get:

405 Method Not Allowed

Any idea why please?

Using the advanced Rest client from chrome I am sending a POST request with all the required variables. There is something wrong somewhere else but cannot work it out :-(

This is my Api\Auth\RegisterController

<?php

namespace App\Http\Controllers\Api\Auth;

use App\User;

use Validator;
use Laravel\Passport\Client;
use Intervention\Image\ImageManagerStatic as Image;
use Illuminate\Validation\Rule;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Storage;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;



class RegisterController extends Controller
{


  private $client;

  public function __construct() {

  $this->client = Client::find(1);

  }


  public function register(Request $request)

      {
       $validator = Validator::make($request->all(), [
        'name'       => 'required|string|min:2|max:64',
        'surname'    => 'required|string|min:2|max:64',
        'username'   => 'required|string|min:2|max:64|unique:users,username',
        'email'      => 'required|string|email|min:2|max:64|unique:users,email',
        'town_id'    => 'required|integer',
        'role_id'    => 'required|integer',
        'password'   => 'required|string|min:6'
        ]);


        dd($request->all());


}
}

This is the api.php

<?php

use Illuminate\Http\Request;



Route::post('register', 'Api\Auth\RegisterController@register');

Route::middleware('auth:api')->get('/user', function (Request $request) {
    return $request->user();
});

The user.php model(top of the page) with the HasApiTokens trait.

<?php

  namespace App;


  //Extra
  use App\Town;
  use App\Role;
  use Laravel\Passport\HasApiTokens;
  use Illuminate\Support\Facades\DB;
  use Illuminate\Pagination\Paginator;
  use Illuminate\Database\Eloquent\Model;
  use Illuminate\Notifications\Notifiable;
  use Illuminate\Contracts\Auth\CanResetPassword;
  //Extra

  use Illuminate\Support\Facades\Auth;
  use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    use HasApiTokens, Notifiable;

AuthServiceProvider.php

<?php

namespace App\Providers;

use Laravel\Passport\Passport;
use Illuminate\Support\Facades\Gate;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;

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

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

        Passport::routes();

    }
}

config/auth.php

    'guards' => [
        'web' => [
            'driver' => 'session',
            'provider' => 'users',
        ],

        'api' => [
            'driver' => 'passport',
            'provider' => 'users',
        ],
    ],

Thanks in advance!