amazon web services - How to get access token once authenticated via AWS Federated Identities -

i understand can access token when authenticate via cognito user pools method:

cognitouser.authenticateuser(authenticationdetails, {             onsuccess: function (result) {                 console.log('access token + ' + result.getaccesstoken().getjwttoken()) 

now, how access token when use federated identities facebook, google? possible access token? able see facebook token, not aws token right in aws user pools.

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