Can't find a way to authenticate using token vs username/password

I've tried several ways of using auth token:
```python
tc=TeamCity('https://tc.my.com',auth=tc_token)
```
and
```python
tc.set_default_header(header_name='Authorization', header_value='Bearer {token}'.format(token=tc_token))
```

all unsuccessful with HTTP 404 error. `HTTP response body: Invalid authentication request or authentication scheme is not supported`

Start by reproducing the two authentication attempts shown in the issue: TeamCity(..., auth=tc_token) and set_default_header(...). Inspect the package's authentication entry points and compare their requests with the TeamCity server's supported token scheme; done means token authentication either works or its supported usage and failure behavior are clearly established.

Written by the indexing model from the issue text.