customAuth is not a function

[zerr0s]

Hello. Forgive me for my bad english.

I'm trying to implement authentication and authorization in my graphql api. If I use 👍

const customAuth = AuthDirective({
  authenticateFunc: () => {
    throw new AuthenticationError('Invalid token!');
  }
});

const server = new ApolloServer({
  typeDefs,
  resolvers,
  schemaDirectives: {
    ...customAuth
  }
});

It's working. But I'm trying to use a custom function:

const server = new ApolloServer({
  typeDefs,
  resolvers,
  schemaDirectives: {
    auth: customAuth().isAuthenticated
  }
});

The results is:

TypeError: customAuth is not a function

If I replace by

auth: customAuth.isAuthenticated

The directive is not working at all, but no error in console.

Any idea please ?