Exchange a Clever oauth code for an access token.
var cleverToken = require('clever-oauth-token')(cleverClientId, cleverClientSecret);
cleverToken({
code: code,
redirect_uri: redirect_uri,
grant_type: 'authorization_code' // optional
}, function(err, access_token) {
});
var cleverToken = require('clever-oauth-token')(
cleverClientId,
cleverClientSecret,
'http://mock-oauth-endpoint/oauth/tokens'
);