//This is how you include the response class.
use SlenderApi\Lib\Response\Response;

//Add this to use the Error Generator class.
use SlenderApi\Lib\Response\ErrorGenerator;

private Response $response;
public function __construct(object $controller)
{
    $this->response = $controller->response;
}

//These 3 methods contain all your configurable error messages.
//Lib/Response/ErrorGenerator/getValidationErrors()
getSystemErrors(), getValidationErrors(), getDataErrors()

//This method will return the error below:
//'27' => array('code' => 27, 'title' => 'User', 'detail' => 'Cannot register a user with an ID.'),
$error = ErrorGenerator::getError(27, 'users', 'data');

//This will add the error to your response object.
//You can add multiple errors and return all of them if you want.
$this->response->addError($error);

//This will output your errors and stop the code from continuing.
$this->response->dieWithCode(400);

//This is the same as dieWithCode but you can pass the errors directly to it.
//It will also stop the code from continuing.
$this->response->outputResponse(400, null, $errors);

//This will output a custom response without killing the code.
$this->response->echoResponse('{"success": true}');

//This will add data to your response.
//you can call it multiple times to add multiple items to your response.
$this->response->addData('user', $users[0]);

//This will log the user our of the API.
$this->response->clearCookiesWithCode(401);