Unable to get my refer a friend code

The link on the blog post about the refer a friend program just takes me to a sign in page, and since I always sign in using my Microsoft account, I am not able to sign into my account on that page (Tiller | Login). How do I get my personal referral link to share with my friends if I sign in using my Microsoft account? I tried both “forgot password” and “send confirmation email” links but got nothing. Thanks!

Duplicated post with here. Closing.