code: def is_admin(self, send, nick, required_role='admin'):
          
          # If the required role is None, bypass checks.
          if not required_role:
              return True
          # Current roles are admin and owner, which is a superset of admin.
          with self.db.session_scope() as session:
              admin = session.query(orm.Permissions).filter(orm.Permissions.nick == nick).first()
              if admin is None:
                  return False
              # owner implies admin, but not the other way around.
              if required_role == "owner" and admin.role != "owner":
                  return False
              # no nickserv support, assume people are who they say they are.
              if not self.config['feature'].getboolean('nickserv'):
                  return True
              if not admin.registered:
                  self.update_authstatus(nick)
                  # We don't necessarily want to complain in all cases.
                  if send is not None:
                      send("Unverified admin: %s" % nick, target=self.config['core']['channel'])
                  return False
              else:
                  if not self.features['account-notify']:
                      # reverify every 5min if we don't have the notification feature.
                      if datetime.now() - admin.time > timedelta(minutes=5):
                          self.update_authstatus(nick)
                  return True
docs: Checks if a nick is a admin.
  
          If NickServ hasn't responded yet, then the admin is unverified,
          so assume they aren't a admin.