code: def add_students(self, student_emails, nid=None):
          
          r = self.request(
              method="network.update",
              data={
                  "from": "ClassSettingsPage",
                  "add_students": student_emails
              },
              nid=nid,
              nid_key="id"
          )
          return self._handle_error(r, "Could not add users.")
docs: Enroll students in a network `nid`.
  
          Piazza will email these students with instructions to
          activate their account.
  
          :type  student_emails: list of str
          :param student_emails: A listing of email addresses to enroll
              in the network (or class). This can be a list of length one.
          :type  nid: str
          :param nid: This is the ID of the network to add students
              to. This is optional and only to override the existing
              `network_id` entered when created the class
          :returns: Python object containing returned data, a list
              of dicts of user data of all of the users in the network
              including the ones that were just added.