fix time geneate logic and replace default datetime by luxon

src/Graphql/graphql.builder.ts

@@ -41,6 +41,7 @@ export type SchemaContext =
         res: Response
         me: User
         pubSub: PubSub
+        invalidateCache: () => Promise<void>
         generator: PrismaCrudGenerator<BuilderTypes>
       }
     }