I got it figured out. I was using the I/O Management API and not the User Management API. I also was using the ent_adobeio_sdk metascope and not the ent_user_sdk metascope. Once I got them switched out, it all started working.

If I turn on verbose mode for curl, I see that it's an HTTP 403 Forbidden error. < HTTP/1.1 403 Forbidden < Server: openresty < Date: Mon, 04 Oct 2021 13:33:45 GMT < Content-Type: application/json < Transfer-Encoding: chunked < Connection: keep-alive < Access-Control-Allow-Credentials: true < Access...

I got the same message when I just tried generating my Access Token from the I/O Management API page when I pasted in my Private Key. I then just refreshed the page and tried again and it worked.

@Asheesh_Pandey Thanks. I'm digging for anything I can find about it. The necessary parameters are all there. I just can't figure out what the Invalid API Key message is about, when the Key I'm using is directly from my project. I've found another post with the same issue, but no real solution was p...

I am trying to do some api calls to assign users to groups. It looks like I successfully get the access token, but when I run the following call, I get the error.  curl -X POST -H "Content-type: application/json" -H "Accept: application/json" -H "x-api-key: ${api_key}" -H "Authorization: Bearer ${ac...