@Override
    protected Map<String, String> getTokens(ConnectionGroup connectionGroup)
            throws GuacamoleException {
        return getTokens();
    }
Returns the tokens which should be added to an in-progress call to
connect() for any Connectable object.

@return
    The tokens which should be added to the in-progress call to
    connect().

@throws GuacamoleException
    If the relevant tokens cannot be generated.
extensions/guacamole-history-recording-storage/src/main/java/org/apache/guacamole/history/user/HistoryUserContext.java