Using the instructions from Constant Contacts, we need to implement the OAuth2 flow that will allow us access to the Carson's Village email list database.
[x] GET request API for the authorization token
[x] API for refreshing the token
[x] Write callback API to exchange authorization code for access token
Using the instructions from Constant Contacts, we need to implement the OAuth2 flow that will allow us access to the Carson's Village email list database.