Freesound Forums

I'm using the API to make an app. I'm trying to get the user information, like just a username would be good. When I use my authorization token, I'm getting a 401 error in my app. On the command line using curl like this:

curl -H "Authorization: Bearer ACCESS_CODE" "https://freesound.org/apiv2/me"

I'm not getting anything in response to that. Just a blank page. Here's the part of the API that explains how to get user info:

https://freesound.org/docs/api/resources_apiv2.html#me-information-about-user-authenticated-using-oauth2-oauth2-required

How do I make this work?