I am trying to add an RSS feed to a Slack channel (I have successfully done so in the past for other RSS feeds) but for some reason I keep getting the error that the feed I am using is not a valid feed URL 
The RSS url is made from a private oAuth Confluence site... it does require authentication (as it should) and I made SURE my log in was correct... any ideas on what I could do? We authenticate to Confluence using our GSuite credentials.


