Update structure to domain driven architecture.

db/store.go

@@ -0,0 +1,19 @@
+package db
+
+import (
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type Store struct {
+	// embedded field, for easier access ie store.GetUser
+	*Queries
+	// named field for explicit calles ie db.Begin
+	db *pgxpool.Pool
+}
+
+func NewStore(db *pgxpool.Pool) *Store {
+	return &Store{
+		Queries: New(db),
+		db:      db,
+	}
+}