Import contacts by id

[dkonopka]

When I'm trying to import and update existing contacts, im getting such error:

Here is an example fileBody:

ID;LOGIN\n1;test_login

I tried to replace ID with ContactId, Contact_Id, Id etc, but nothing works properly. Documentation is also not mentioning this info.

{
  "code": "invalid_parameter",
  "message": "We could not find any valid email or SMS or Contact ID in the file you uploaded. Please add at least one valid email address (ex: [email protected]) or SMS (e.g: +33xxxxxxxxx or 0033xxxxxxxxx where +33 is the country code) or Contact ID (e.g: 1) in your file and then try to upload. Also check that you are not using space as a delimiter"
}