Add revoke access token function

[p3root]

Implementation for revoke access token.

[JSkimming]

@p3root have you managed to actually revoke an access token?

The endpoint https://owner-api.teslamotors.com /oauth/revoke returns 200 (OK) no matter what I throw at it, but it doesn't actually revoke the access token.

1. I've successfully acquired a new token.

curl -X POST \
  https://owner-api.teslamotors.com/oauth/token \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d 'grant_type=password&client_id=<the_client_id>&client_secret=<the_client_secret>&email=<the_email>&password=<the_password>'

2. Used the access token to list the vehicles.

curl -X GET \
  https://owner-api.teslamotors.com/api/1/vehicles \
  -H 'Authorization: Bearer <the_access_token>'

3. Called revoke Revoke Access Token and got a 200 (OK) response.

curl -X POST \
  https://owner-api.teslamotors.com/oauth/revoke \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d token=<the_access_token>

4. Then used the access token again to list the vehicles again.

curl -X GET \
  https://owner-api.teslamotors.com/api/1/vehicles \
  -H 'Authorization: Bearer <the_access_token>'

If you've managed to successfully revoke an access token using /oauth/revoke, can you provide curl examples as I have above?

[p3root]

You need to set the Authorization Header with the access token you want to revoke.

[JSkimming]

@p3root I've just published release 0.8.0 it's available to download from NuGet.