Workflows for administrative tasks?

Reference: https://github.com/postgraphql/postgraphql/issues/488

Could you please further explain following points with an example.

> Then I modify the JWT role based on whether or not the user is an admin (appname_admin) or not (appname_visitor). I also set a JWT claim for admin for when security definer is used somewhere (since that effectively changes the role) so I can use a current_user_is_admin() method in my DB logic.

> (Authenticator is the default role that PostGraphQL assumes, I grant that role only enough permissions to introspect the schema and no more, plus of course the ability to switch to one of the relevant roles based on the JWT)