api token

I ask for help in understanding how to correctly create and use the API Token. I first create a user and then create a token for that user. A token ID and secret is generated for me. I'm interested in what UUID is in USER @ REALM format! TOKENID = UUID

When using the HTTPS API, it appears that the authentication method affects ISO uploads. When using standard username/password authentication, the upload works as expected. When using an API Token (for the same user with all the user's permissions), the upload fails and the Response is a 501...