Opened an account with MGM M life. I used this link (world.hyatt.com/content/gp/en/rewards/other-partnerships.html
) to go straight into my World of Hyatt match page. From there I clicked on "Opt-In". I was logged into both programs (separate tabs in my browser) and as soon as I clicked to opt-in I was redirected to the MGM page with a successful message and instant match to Pearl.