title: SAML 2.0 password authentication
body: <p>I'm aware of how SAML is used for single sign on (SSO). That is, redirection to IDP from SP and getting the user's identity from the SAML response/assertion.</p>
  
  <p>My question is - Does SAML 2.0 specification define how to pass username and password as part of a SAML request xml for authentication? Note that I'm not talking about single sign on and just want authentication of username/password.</p>
  
  <p>Thanks,</p>