public Integer getMaxConnections() {
        return maxConnections;
    }
Returns the maximum number of connections that can be established to
this connection concurrently.

@return
    The maximum number of connections that can be established to this
    connection concurrently, zero if no restriction applies, or null if
    the default restrictions should be applied.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/connection/ConnectionModel.java