Checkmk Werk 15552: host_tag_group: allow 401 for delete endpoint

ID: 15552 Title: host_tag_group: allow 401 for delete endpoint Component: REST API Level: 1 Class: Bug fix Version: 2.3.0b1 Prior to this werk, the REST API raised a 500 internal server error when the user was not allowed to delete the host tag group. This werk fixes this issue and the REST API will now report a 401 unauthorized error instead.