[Request] ensure that URLs are not logged by requests on errors

[cp2004]

What would you like implemented?

In some cases where a network request can encounter an error, just logging the exception from requests is not good enough because this contains the URL that it was trying to access. For upload sessions, this URL is unique and while it should expire so there is no security compromise, log files shouldn't really contain stuff like this.

All access tokens used are never logged as they are securely contained in request headers.

Thought of while looking at #175