public Integer getMaxConnectionsPerUser() {
        return maxConnectionsPerUser;
    }
Returns the maximum number of connections that can be established to
this connection concurrently by any one user.

@return
    The maximum number of connections that can be established to this
    connection concurrently by any one user, 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