switch to pgx driver + create merch

internal/merch/handler.go

@@ -1,7 +1,8 @@
 package merch
 
 import (
-	"database/sql"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"merch-api/internal/user"
 	"merch-api/pkg/utils"
 )
 
@@ -10,14 +11,15 @@ type Handler struct {
 }
 
 type Deps struct {
-	DB    *sql.DB
-	Utils utils.Utils
+	DB           *pgxpool.Pool
+	Utils        utils.Utils
+	UserProvider user.Provider
 }
 
 func New(deps Deps) *Handler {
 	r := newRepo(deps.DB)
-	s := newService(r, deps.Utils)
-	c := newController(s)
+	s := newService(r, deps.Utils, deps.UserProvider)
+	c := newController(s, deps.Utils)
 
 	return &Handler{
 		controller: c,