return "errors.password_length";
        }

        if (fessConfig.isPasswordRequireUppercase() && !containsUppercase(password)) {
            return "errors.password_no_uppercase";
        }

        if (fessConfig.isPasswordRequireLowercase() && !containsLowercase(password)) {
            return "errors.password_no_lowercase";
        }

    /** The key of the message: Password must contain at least one uppercase letter. */
    public static final String ERRORS_password_no_uppercase = "{errors.password_no_uppercase}";

    /** The key of the message: Password must contain at least one lowercase letter. */
    public static final String ERRORS_password_no_lowercase = "{errors.password_no_lowercase}";