Exchange an authorization_code for an access-token. The authorization_code is returned in the Connect onSuccess callback after the user successfully submits their utility credentials.

The access_token will not expire. Make sure you securely store it in your database so you can make future requests for the given user.

The fields access_token_expires_in, refresh_token, and refresh_token_expires_in can be ignored. These are included for applications using our legacy authorization framework.