I have a
magento 2.1.9 and i want to upgrade it to
magento 2.2.0 (or if possible straight to
magento 2.3.0 even tho i think that that's not possible because of php version). But when the store was installed there was no authentication public/private key used. How do i upgrade my magento in this scenario?
P.S: My store has around 900 products, ~2000 orders and customers,and i would like to keep them. :(