case "errors.password_no_special_char":
            messages.addErrorsPasswordNoSpecialChar(GLOBAL);
            break;
        case "errors.password_is_blacklisted":
            messages.addErrorsPasswordIsBlacklisted(GLOBAL);
            break;
        default:
            messages.addErrorsBlankPassword(GLOBAL);
            break;
        }
    }

    /**
     * Returns the index HTML response.

        case "errors.password_no_special_char":
            messages.addErrorsPasswordNoSpecialChar(GLOBAL);
            break;
        case "errors.password_is_blacklisted":
            messages.addErrorsPasswordIsBlacklisted(GLOBAL);
            break;
        default:
            messages.addErrorsBlankPassword(GLOBAL);
            break;
        }
    }

    private OptionalThing<HttpSession> getSession() {