curl --request POST \
  --url https://api.example.com/cabinet/auth/account/link/telegram \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "init_data": "<string>",
  "id_token": "<string>",
  "id": 123,
  "first_name": "<string>",
  "last_name": "<string>",
  "username": "<string>",
  "photo_url": "<string>",
  "auth_date": 123,
  "hash": "<string>"
}
'

{
  "success": true,
  "message": "<string>",
  "merge_required": false,
  "merge_token": "<string>"
}