Neo4j GraphQL provides a secure way to authenticate and authorize users, using a combination of JSON Web Tokens (JWT) and the Graphical Query Language (GQL). The Neo4j GraphQL library uses JWTs to authenticate users, and provides an Object Graph Model (OGM) that allows developers to create custom resolvers for authentication. The auth directive can be used on Type definitions and fields to enforce specific rules, such as allowing or binding patterns between properties. The `where` key is used to specify equality predicates, while the `allow`, `bind`, and `roles` keys enable more complex authorization logic. By using these features, developers can build production-ready Neo4j GraphQL APIs with robust authentication and authorization mechanisms.