I can't connect to the REST API. I get a 401 error. Even using the official "OAuth tool"

[sneakpeeq]

I use the internal oauth tool to generate an oauth request, and when I paste the curl into my terminal, I get this:

[Error: HTTP Error 401: Unauthorized]
statusCode: 401,
data: ‘{“error”:“Could not authenticate with OAuth.”,“request”:"\/1\/account\/verify_credentials.json"}’

What’s going on?