As was mentioned here, authentication tokens obtained from /users/authenticate can now be passed for /users/id/library calls, provided the ID is “me” instead of the id number. However, as the API is in testing, we all have the same authentication token, so nothing is retreived; when testing, use the id number to get actual results.

Additionally, the substring for the authentication token is “&auth_token=<token>”; the API documentation replaces < with %3C; and > with %3E;.

This issue is mostly for clarification for new users and for tracking the issue.