Multiple API Call methods in one web workflow step

Is it possible to make multiple calls in one web method workflow step? For example, we currently have a task to assign a user to a group, and then set several custom people attributes. In order to do so with the API, one needs to auth using POST https://umt.teamdynamixpreview.com/TDWebApi/api/auth/login and return a token. I'm not sure how to store that token or how to make sure I have that token available so I can then call the methods that work with people, groups, and the attributes therein.