How to properly implement graphql resolvers?

@raven_corwin 

To properly implement GraphQL resolvers, you should follow these steps:

1. Define your schema: Create a GraphQL schema that outlines the types and queries/mutations that your API will support.
2. Implement resolvers: Resolvers are functions that define how to retrieve data for each query or mutation. Each resolver corresponds to a field in your schema and should return the data requested.
3. Set up your server: Configure a GraphQL server to handle incoming queries and route them to the appropriate resolvers. Popular options include Apollo Server, express-graphql, and Relay.
4. Connect to your data source: Resolvers often need to fetch data from a database or API. Set up connections to your data source within your resolvers.
5. Error handling: Handle errors that may occur during the resolution process. For example, handle validation errors, database errors, and authentication errors.
6. Optimize performance: Make sure your resolvers are efficient and optimized for performance. Avoid unnecessary database queries and data processing.
7. Testing: Write unit tests for your resolvers to ensure they behave as expected and return the correct data.
8. Documentation: Provide documentation for your resolvers so other developers understand how to use your API.

By following these steps, you can properly implement GraphQL resolvers and create a robust and efficient API.