diff --git a/Databases/GraphQL/Creating_a_GraphQL_server.md b/Databases/GraphQL/Creating_a_GraphQL_server.md
index 4bd6b4b..a630d1a 100644
--- a/Databases/GraphQL/Creating_a_GraphQL_server.md
+++ b/Databases/GraphQL/Creating_a_GraphQL_server.md
@@ -248,3 +248,7 @@ We should always return something, even if we are applying  mutation, hence we
 ```
 
 // Add new image of this working in GraphiQL
+
+// TODO: Explain input types (https://graphql.org/graphql-js/mutations-and-input-types/)
+
+// TODO: Explain enums