A way to conditionally hide a field

**Describe the issue**
I did read the docs but could not find any feature to conditionally hide a field.

I have a simple use case, Each user in my DB has a email, now in some cases I want to return it in Graphql response and in some not, what is the best way to implement it?

Should that be done just in the resolver, or is there a type-graphql Decorator to hide a field conditionally?
Or maybe I should use a FieldResolver and it will override the original return with what I want?

The issue names no files, tests, or entry points. Start by reviewing the project documentation and the TypeScript GraphQL schema and resolver guidance for conditional field exposure. A complete outcome would need a documented supported approach or an accepted implementation scope, neither of which the issue currently specifies.

Written by the indexing model from the issue text.