IBM messagehub-node

Hi,
Can anyone has any example about what is the correct node to install and how to connect into IBM message hub (renamed by event stream) node to subscribe into a message ?

found both
@nickcis/node-red-contrib-messagehub-node (got an error when installing)
node-red-contrib-messagehub (included a new node called messagehub) *this one ask for a bluemix string - does anyone know the format of this connection string should be ?

Thanks,

Sandra