graphql-date | GraphQL Date Type | GraphQL library

You are saying the username parameter is type 'username' which isn't a valid type (same with email, password, and location). Assuming username, email, password, and location are strings and required, the mutation should look something like this:

Assuming you're using express-graphql or similar middleware, your GraphQL endpoint will be accessable using both POST and GET requests.

Using POST:

1. Change the request URL to match your server's GraphQL endpoint
2. Make sure the method for the request is POST, not GET
3. Under Body, select x-www-form-urlencoded
4. Add query as a key and your entire query string as the value
5. If you have any variables, add a variables key and include them as the value (they'll need to be correctly-formatted JSON).

Using GET:

1. Change the request URL to match your server's GraphQL endpoint
2. Make sure the method for the request is GET
3. Add query as a key and your entire query string as the value under Params
4. If you have any variables, add a variables parameter and include them as the value (they'll need to be correctly-formatted JSON).

Alternatively...

If you're building a GraphQL server, you may find it much easier to expose a Graph i QL endpoint for testing your queries. You can read more about it here.

It's baked into both graphql-server-express (see docs here) and express-graphql (docs here).

Edit: As far as manipulating the data from your request: yes, the resolver functions are where you can read your request and specify the data being returned. However, each resolve() function is tied to a specific field, which returns a particular type. Queries and mutations are themselves nothing more than fields on a "Root Query" or "Root Mutation" type, which is why they also have resolve functions.

Your secretMessage query resolves to a type of secretMessage, but you're resolving it to a String. If you try to run that query, it will always return null as a result. Instead, if you want it to return an object with a name property that you modify according to the argument you pass in, you can do this: