OAuth2 /token endpoint rejects requests correctly-encoded as "application/x-www-form-urlencoded"

[dweitzman]

In testing with an off-the-shelf oauth2 client implementation, a POST to https://api.getsling.com/oauth2/token failed with 415 (Unsupported Media Type)

https://www.rfc-editor.org/rfc/rfc6749#section-4.1.3 states that OAuth2 token requests use the application/x-www-form-urlencoded format, but it looks like the Sling API only accepts application/json encoding if the example request given in https://github.com/getsling/getsling-api-docs/blob/develop/docs/oauth.md is accurate

Would it be impossible to make the API accept well-formatted oauth2 requests from libraries that follow the OAuth2 standard? Otherwise I won't be able to use the sling API

Thanks!