def post(self, *args, **kwargs):
<EOL>if '<STR_LIT>' in self.request.POST:<EOL><INDENT>return self.render_goto_step('<STR_LIT>')<EOL><DEDENT>return super(LoginView, self).post(*args, **kwargs)<EOL>
The user can select a particular device to challenge, being the backup
devices added to the account.