Half The Battle

Some things are just good to know, for example:

• git
• SQL
• networking protocols (UDP, TCP, HTTP)
• the relative speeds of various storage media (L1, L2 caches, RAM, and disk)
• the airspeed velocity of an unladen European swallow

Add to that list OAuth2, the lingua franca of authentication. Get yourself acquainted with this helpful two-part series:

• https://stackoverflow.blog/2022/12/22/the-complete-guide-to-protecting-your-apis-with-oauth2
• https://stackoverflow.blog/2022/04/14/the-authorization-code-grant-in-excruciating-detail