Go: Bought "Let's Go Further" b/c it has a section on authentication for API backends; read that section; notice he has the code in his project set up differently than mine; rearrange my project directory structure to match the book's recommendation; spent some time looking at how he does authentication in the book; decided that I should maybe instead try to follow the Huma guide to doing OAuth 2.0: huma.rocks/how-to/oauth2-jwt/