public String getMySQLHostname() throws GuacamoleException {
        return getProperty(
            MySQLGuacamoleProperties.MYSQL_HOSTNAME,
            DEFAULT_HOSTNAME
        );
    }
Returns the hostname of the MySQL server hosting the Guacamole
authentication tables. If unspecified, this will be "localhost".

@return
    The URL of the MySQL server.

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