You are required to create a React Native Expo application that implements a simple authentication mechanism. The application should communicate with the server using GraphQL API.
Our server is available on API URL: https://uplab-test-auth-backend-3211cfc38d0c.herokuapp.com/graphql
You can use a GraphQL sandbox to write queries and test your requests: https://studio.apollographql.com/sandbox/explorer?endpoint=https://uplab-test-auth-backend-3211cfc38d0c.herokuapp.com/graphql