My goal is to build an commerce website like shopify, volusion, bigcommerce, or magento etc. just to name a few examples.
My client must be able to log in with a password and a username to gain priviledged information to gain access (like codecademy) to their own personal profile page, account information, and dashboard which will release special pricing, deals of the week etc.
Which languages do I need to learn to do so, and how long would it take to realistically learn them?
Thanks in advance!