Add /auth/token API endpoint

- Returns the current user's API token if there is a authenticated
session already established
1 job for 187-react-auth-flow in 35 seconds (queued for 1 second)
Name Stage Failure
Go-py3.7 Test
  Downloading (147kB)
Collecting virtualenv (from pipenv)
Downloading (1.9MB)
Installing collected packages: virtualenv-clone, certifi, virtualenv, pipenv
Successfully installed certifi-2018.8.24 pipenv-2018.7.1 virtualenv-16.0.0 virtualenv-clone-0.3.0
$ pipenv install -d --system --deploy
Your Pipfile.lock (ee51e7) is out of date. Expected: (24e346).
Aborting deploy.
ERROR: Job failed: exit code 1