Hello,
Actually, I have a web service which is requested by my website, and I would like to use this web service to request an other web service which need crowd authentication.
The clients have a crowd token given by an other website which authenticate them on the crowd server and i would like to use this token on my web service to authenticate them on the crowd server. And by this way the web service can do request by their access and their name.
But it work if I use the session.post to create a token with their user password, but if i copy past or get the token from the authentication website it didn't work.
It's close from this organization: 
I'm sorry if it isn't very well explained, don't hesitate to ask me if you have any question.
Thanks in advance.