add tags to list member

[JoopStringer]

What's the "right" way to add/remove tags to list members.
I tried almost all of the possibilities.

1. using tags as array in Member instance and URL lists/{0}/members/{1} using PUT/PATCH/POST : no luck
2. using the url lists/{0}/members/{1}/tags and using POST with tag array in body of request: no luck

Not a clear answer ...

[robertnabbe]

I've noticed tags can only be set on user creation (https://mailchimp.com/developer/marketing/api/list-members/add-member-to-list/); it appears you can not update the tags of a user after the fact however, (neither https://mailchimp.com/developer/marketing/api/list-members/add-or-update-list-member/ nor https://mailchimp.com/developer/marketing/api/list-members/update-list-member/ show tags as a valid body parameter).

Also, no response on this issue, even after almost 2 years? What is this about?