Add a viewer field at the root, that returns the currently logged in User. It is a standard feature on GraphQL schemas. It is an equivalent of REST's /me resource.

It can be used by application developers to show informations about the currently logged in user, as a UserContent. It should give access to User Groups as well. Usage example with the Apollo client: https://reactgo.com/graphql-react-apollo-client.

{
  viewer {
    user_account { login email }
    firstname
    lastname
    image { variation(identifier: avatar) { uri } }
  }
}