Previously, when importing contacts from CSV and creating users via API, it was possible to create users of only "Email" and "Calls" channels by specifying an email and/or a phone number. However, users often do not specify these data when placing orders or contacting support, as they choose social networks or messengers for communication.
Now contacts in messengers or social networks can be imported from CSV and users can be created on their basis via API. It is enough to specify the id/number/username in a social network or messenger.
а. When creating a user via API, you need to pass a parameter with the name of a specific channel.