@Override
    public int getDefaultMaxConnectionsPerUser() throws GuacamoleException {
        return getProperty(
            PostgreSQLGuacamoleProperties.POSTGRESQL_DEFAULT_MAX_CONNECTIONS_PER_USER,
            DEFAULT_MAX_CONNECTIONS_PER_USER
        );
    }
Constructs a new PostgreSQLEnvironment, providing access to PostgreSQL-specific
configuration options.

@throws GuacamoleException
    If an error occurs while setting up the underlying JDBCEnvironment
    or while parsing legacy PostgreSQL configuration options.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/java/org/apache/guacamole/auth/postgresql/conf/PostgreSQLEnvironment.java