added validaton for assigning users to events

backend/pkg/router/router.go

@@ -146,10 +146,10 @@ func init() {
 					args.Status = fiber.StatusUnauthorized
 
 					logger.Log().Msgf("user not authorized")
+				} else {
+					handler(&args)
 				}
 
-				handler(&args)
-
 				return args.send(c)
 			})
 		}