I would like to make my own user registration using Ajax. I created form, on submit I call function registerUser

$('#registration-form').submit(registerUser);

  function registerUser() {
      var $form = $(this);

      $form.find('.error').html('');
      $form.find('input[type=text],input[type=password]').removeClass('error');

      var values = {};
      $.each($form.serializeArray(), function (i, field) {
          values[field.name] = field.value.trim();
      });

      var errors = {};
      //checkRegistrationData(values, errors);
      
      if(!jQuery.isEmptyObject(errors)) {
        $.each( errors, function( field, error ) {
          if(errors[field]) {
            $form.find('.error.'+field).html(error);
            var id = 'registration-' + field.replace('error-', '');
            $form.find('#' + id).addClass('error');
          }
        });
      } else {
      var options = {
            url: $form.attr("action"),
            type: $form.attr("method"),
            data: $form.serialize(),
            dataType: 'JSON'
        };

      $.ajax(options).done(function (data) {
        console.log(data);
      });  
    }

      return false;
  }

also I added route

Route::group(['middleware' => ['web']], function () {
    Route::post('register', 'UserController@register');
});

and added method in User controller

class UserController extends Controller
{
    public function register() {

    	if(Request::ajax()) {
	      
	    }     
    }
}

but I got an error

POST http://localhost:8080/snimu/public/register 500 (Internal Server Error)

What's wrong? And How to get data in controller to save it to database?

I added meta tag to master page

<meta name="csrf-token" content="{{ csrf_token() }}">

and at the begining js file added

$.ajaxSetup({
        headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
        }
});

but error stays the same