code: def tj_email(self):
          
  
          for email in self.emails.all():
              if email.address.endswith(("@fcps.edu", "@tjhsst.edu")):
                  return email
  
          if self.is_teacher:
              domain = "fcps.edu"
          else:
              domain = "tjhsst.edu"
  
          return "{}@{}".format(self.username, domain)
docs: Get (or guess) a user's TJ email.
  
          If a fcps.edu or tjhsst.edu email is specified in their email
          list, use that. Otherwise, append the user's username to the
          proper email suffix, depending on whether they are a student or
          teacher.