How to get the SAML OAuth token

I have successfully installed and configured the SAML20 AppStore module which has enabled me to log in to my app using SSO. I now want to use the privileges of the logged in user to  call another REST service (in this case Microsoft Graph) using the bearer token of the currently logged in user. I can’t work out though how to retrieve the token from the SAML module.  Can anybody point me in the right direction please.
1 answers

Does this help?