Hello, I have a question about the "POST Test Send an Email Campaign Activity", and the "GET Details About a Single Email Campaign" functions.    My Goal:   I am working on a popup on our site. This popup takes an email submission from the user. I'd like to use the Constant Contact API to send the user a specific email I've created from Constant Contact to their own email that they submitted in the popup.     What I know/What I have tried: I see that I need the campaign_activity_id for the  "POST Test Send an Email Campaign Activity" I see that I can GET that id with the "GET Details About a Single Email Campaign" I need the campaign_id for this function As far as I've been made aware, this can be found in the URL at the end of the https://app.constantcontact.com/pages/campaigns/email-details/details/activity/{mycampaignIDhere} When entering the ID in the API reference page, I get this error:     Questions: What can I do to get the campaign_id, so I can use the "GET Details About a Single Email Campaign" function to get the campaign_activity_ID, so I can use that to "POST Test Send an Email Campaign Activity"? Am I going about my goal correctly? I don't see another way to send out an email to a specific email address using the API other than using this test function. ... View more