public void setValidUntil(Date validUntil) {
        this.validUntil = validUntil;
    }
Sets 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 provided Date object will be ignored.

@param validUntil
    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