Add client_id and client_secret to token_params

[wnm]

When using this gem, I received the following error:

OAuth2::Error (invalid_request: Missing client_id param
{"error":"invalid_request","error_description":"Missing client_id param"}):

I'm not sure if that changed recently, but according to the monday oauth docs we need to add the client_id and client_secret to the as params to the token url.