How to know if a user is "active"?

Question

Classmates

When sending a notification to users, we receive an error in response:
{"error_code":25,"error_msg":"NOT_ACTIVE : active.user.required","error_data":null}
As far as I understand, we are sending "inactive" users.
How can I find out if the user to whom the notification is being sent is "active"?

Answer 1

Naturally, the moment immediately before sending was meant. Yesterday, however, I received an email from the ok.ru development team.
The answer is exactly the same as the answer to the question "How to make a witty person out of dimonchik2013?".
No way. The question is closed.

Answer 2

if "error_msg":"NOT_ACTIVE:
user.active = 'NOT ACTIVE'