How to acquire a SAML token

Hi,

We know how to acquire a SAML token from the SSO API using the VC username/password, but couldn't figure out how to get those.

Is there a way for the web client to retrieve the username and password so it may pass them on to the java service that will use them to get the token?

Is there an alternative - some other data that the web client can get and could be used to acquire the token?

Thanks,

Eitan