public Date getValidUntil() {
        return validUntil;
    }
Returns the day after which this account can no longer be used. Account
validity ends at midnight of the day following this day. Any time
information within the returned Date object must be ignored.

@return
    The day after which this account can no longer be used, or null if
    this restriction does not apply.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/user/UserModel.java