If you have not created an account yet, you can use your friend's referral code. Important: You must use the referral code at registration.
When you're creating your account, there will be a field to enter your friend's referral code. Enter the Referral Code, and then click "Apply Code".
If your friend gives you a referral code link, the Referral Code will automatically be applied.
Then, just complete the account registration and your friend will now have you as a referral!
I created my account already and forgot to use my friend's referral code. Can I still use it?
Unfortunately, once your account is created, the referral code is no longer usable.