@Override
    public boolean enforceAccessWindowsForActiveSessions() throws GuacamoleException {

        // Enforce access window restrictions for active sessions unless explicitly disabled
        return getProperty(
                MySQLGuacamoleProperties.MYSQL_ENFORCE_ACCESS_WINDOWS_FOR_ACTIVE_SESSIONS,
                true
        );
    }
Return the server timezone if configured in guacamole.properties, or
null if the configuration option is not present.

@return
    The server timezone as configured in guacamole.properties.

@throws GuacamoleException
    If an error occurs retrieving the configuration value.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/conf/MySQLEnvironment.java