Clio API v4 returns ForbiddenError for every request. 
For example this request works without problem:

`GET /api/v2/users/who_am_i HTTP/1.1
 Host: app.clio.com
 Authorization: Bearer ***`

And this request doesn't work:

`GET /api/v4/users/who_am_i HTTP/1.1
 Host: app.clio.com
 Authorization: Bearer ***`

This is the error returned with status 403:

`{"error":{"type":"ForbiddenError","message":"User is forbidden from taking that action"}}`

The same happens with any other request.