After multiple times searching, I found client_get_groupid. I think this does the trick.
If I do a {"session_id": "fadba2d5d0edea01665d6ecc87df5d0c", "primary_id": {"client_id": "1"}} to the REST API on...
For invoicing I try to get the hosting information via de API. I now the client_ids but I don't know what client has what domain. I the database I...
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