@Override
    public Credentials getCredentials() {
        return credentials;
    }
Creates a new TunnelConnectEvent which represents the connecting of the
given tunnel via a request associated with the given credentials.

@param authenticatedUser
    The AuthenticatedUser associated with the user that is connecting the
    tunnel, if any.

@param credentials
    The credentials associated with the request that connected the
    tunnel. Note that these credentials are not necessarily the same as
    the credentials provided when the user authenticated.

@param tunnel The tunnel being connected.
guacamole-ext/src/main/java/org/apache/guacamole/net/event/TunnelConnectEvent.java