Major refactor, splitting user handlers into separate files and changes to how the database is accessed

backend/internal/database/middleware.go

@@ -0,0 +1,17 @@
+package database
+
+import "github.com/gofiber/fiber/v2"
+
+// Simple middleware that provides a shared database pool as a local key "db"
+func DbMiddleware(db *Database) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		c.Locals("db", db)
+		return c.Next()
+	}
+}
+
+// Helper function to get the database from the context, without fiddling with casts
+func GetDb(c *fiber.Ctx) Database {
+	// Dereference a pointer to a local, casted to a pointer to a Database
+	return *c.Locals("db").(*Database)
+}