Will someone help me with the PHP code to authenticate my Sendgrid account connection and then delete a Marketing Campaign recipient via API?
From the help documentation, this appears to be the command line -- DELETE https://api.sendgrid.com/v3/contactdb/lists/{list_id}/recipients/{recipient_id} HTTP/1.1 -- but I can't figure out what to do with it, since it isn't regular PHP code. The only sample code I found pertained to Legacy Newletters (which I got to work) and not contacts used by Marketing Campaigns.