Hi there,   I am setting up a Wordpress plugin which will enable end users to sign up to one of their Constant Contact lists. I am following these instructions here about oauth:   http://developer.constantcontact.com/docs/authentication/oauth-2.0-client-flow.html    The problem I am having is that the redirect URI can only be a single URL, but I need it to go the customers Wordpress website. So this isn't going to work. I was hoping I could pass an additional query string paramter so I could then do a 2nd redirect from my website back to their Wordpress website, but I can't pass in any additional parameters.    How do I go about solving this issue? Is the solution with like a SSO as detailed here: https://developer.constantcontact.com/docs/account-management/sso.html  it says: Approved Constant Contact technology partners selling Toolkit can integrate with Constant Contact's Single Sign On how do I go about becoming a technology partner? If this is what I need to do?   Your help is much appreciated!   Thanks, ... View more