Challenge: Creating a Basic GraphQL Endpoint

Problem statement

For this challenge, let’s say we want to build a GraphQL endpoint for a car rental service that performs the following operations:

• Add, delete, and update a car in the list of available cars.

• Create a new car rental with the needed information.

• Create a user for the person renting a car.

Playground

Implement and test your logic in the code widget below:

Tip: To test your solution, you need to test the following mutations: addCar(), deleteCar() and addUser().