3_AUTHORIZATION

Authorization

In this module we add authentication to our movies search GraphQL API using the graphql-auth-directives package and JSON Web Token (JWT).

Overview

GraphQL Auth Directives

By attaching

Let's review the documentation for using graphql-auth-directives in the GRANDstack docs.

JWT

JSON Web Token (JWT) allows us to create cryptographically signed tokens that embed claims, expressed as a JSON payload.

We'll use the JWT.io online playground to create a JWT for our application.

Exercise ⏲️ 5 minutes

• Create a JWT using JWT.io
• Use random 256-bit key for for the signing key: Dpwm9XXKqk809WXjCsOmRSZQ5i5fXw8N
• Include the following payload, replacing name and email:

{
    "sub": "u1",
    "name": "William Lyon",
    "email": "[email protected]",
    "iat": 1602765555
}

For example, here is the token generated using the above payload:

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1MSIsIm5hbWUiOiJXaWxsaWFtIEx5b24iLCJlbWFpbCI6IndpbGxAZ3JhbmRzdGFjay5pbyIsImlhdCI6MTYwMjc2NTU1NX0._gOShe-H1G1NR69s4dmlnjnrB1d88xsLGrKUU4f_poI

Exercise ⏲️ 15 minutes

• Protect the Business address field with the @isAuthenticated schema directive
• Query your GraphQL endpoint using GraphQL Playground to verify the address is protected.
• Protect the User type with the @hasRole directive, ensuring that only users with the role "admin" are able to access user information

Cypher Params

We can use middleware to inject user specific information into Cypher queries defined in the @cypher schema directive. Let's review the documentation for this feature here.

Exercise ⏲️ 15 minutes

Using the Cypher params functionality:

• Add a query field to return the currently authenticated user
• Add a mutation to add businesses to a user-specific "favorites" list
• Add a query field to return the list of favorited businesses for the currently authenticated user