php-http / HttplugBundle

                    ->always()

                    ->then(function ($config) {

                        switch ($config['type']) {

                            case 'basic':

                                if (empty($config['username']) || empty($config['password'])) {

                                    throw new InvalidConfigurationException('Authentication "basic" requires both "username" and "password".');

                                }

                                break;

                            case 'bearer':

                                if (empty($config['token'])) {

                                    throw new InvalidConfigurationException('Authentication "bearer" requires a "token".');

                                    throw new InvalidConfigurationException('Authentication "service" requires a "service".');

                                }

                                break;

                            case 'wsse':

                                if (empty($config['username']) || empty($config['password'])) {

                                    throw new InvalidConfigurationException('Authentication "wsse" requires both "username" and "password".');

                                }

                                break;

                        }

                        return $config;