code: def add_user(self, workspace, params={}, **options): 
          
          path = "/workspaces/%s/addUser" % (workspace)
          return self.client.post(path, params, **options)
docs: The user can be referenced by their globally unique user ID or their email address.
          Returns the full user record for the invited user.
  
          Parameters
          ----------
          workspace : {Id} The workspace or organization to invite the user to.
          [data] : {Object} Data for the request
            - user : {String} An identifier for the user. Can be one of an email address,
            the globally unique identifier for the user, or the keyword `me`
            to indicate the current user making the request.