server: implement working db transaction with users

server/api/response.go

@@ -0,0 +1,23 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/go-chi/render"
+)
+
+func NewUserPayloadResponse(user *User) *UserPayload {
+	return &UserPayload{User: user}
+}
+
+func NewUserListResponse(users []*User) []render.Renderer {
+	list := []render.Renderer{}
+	for _, user := range users {
+		list = append(list, NewUserPayloadResponse(user))
+	}
+	return list
+}
+
+func (u *UserPayload) Render(w http.ResponseWriter, r *http.Request) error {
+	return nil
+}