make temporary auth solution

backend/auth.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/zitadel/zitadel-go/v3/pkg/authorization/oauth"
+	"github.com/zitadel/zitadel-go/v3/pkg/http/middleware"
+)
+
+func auth(mw *middleware.Interceptor[*oauth.IntrospectionContext]) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		mw.RequireAuthorization()(http.HandlerFunc(authHTTPHandler(mw, c))).ServeHTTP(c.Writer, c.Request)
+	}
+}
+
+func authHTTPHandler(mw *middleware.Interceptor[*oauth.IntrospectionContext], c *gin.Context) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		authCtx := mw.Context(r.Context())
+		c.Set("id", authCtx.UserID())
+		c.Next()
+	}
+}