How to properly throw exception in methods of IAuthenticationTokenProvider

Lets say i implement ReceiveAsync method.
at the end of this method I should to call  context.DeserializeTicket(...)
if would like to implement cusom logic, for example if I did not found refresh token - display such error message to user.
however:
1. SetError method not exists in AuthenticationTokenReceiveContext class

2. throw new Exception(...) not gives as result json object

Any suggestions?