HEINRICH HAASBROEK - ACCOUNT NUMBER: 3320614 www.mannapages.com/heinrichhaasbroek. Get Started Today . It’s So Easy to Join Mannatech and the M5M℠ Movement. All you need to do are a couple of things: 1.Make sure you have the account number of the friend who referred you. 2.Click on the Join Now button. You will be asked for some simple information about yourself, including your friend’s account number. Once you fill that in, you’ll be ready to place your first order.