wire auth to example, fix wire format, it's aliiiiiive!

example/caller.go

@@ -3,17 +3,48 @@ package example
 import (
 	"context"
 	"fmt"
+	"net/http"
 	"os"
 
 	"github.com/Khan/genql/graphql"
 )
 
+type authedTransport struct {
+	key     string
+	wrapped http.RoundTripper
+}
+
+func (t *authedTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	req.Header.Set("Authorization", "bearer "+t.key)
+	return t.wrapped.RoundTrip(req)
+}
+
 func Main() {
-	client := graphql.NewClient("https://api.github.com/graphql", nil)
-	resp, err := getViewer(context.Background(), client)
+	var err error
+	defer func() {
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	}()
+
+	key := os.Getenv("KEY")
+	if key == "" {
+		err = fmt.Errorf("must set KEY=<github token>")
+		return
+	}
+
+	httpClient := http.Client{
+		Transport: &authedTransport{
+			key:     key,
+			wrapped: http.DefaultTransport,
+		},
+	}
+	graphqlClient := graphql.NewClient("https://api.github.com/graphql", &httpClient)
+	resp, err := getViewer(context.Background(), graphqlClient)
 	if err != nil {
-		fmt.Println(err)
-		os.Exit(1)
+		return
 	}
-	fmt.Println("you are:", resp.Viewer.Name)
+
+	fmt.Println("you are:", *resp.Viewer.Name)
 }