Global in-memory storage for GraphQL in Golang

main.go

...
	"github.com/artemis-tech/sample-graph/graph"
)

func main() {
	port := "3030"
	if os.Getenv("PORT") != "" {
		port = os.Getenv("PORT")
	}

	// initializes graph package global Users variable with 0 entries and capacity of 30
	graph.Users = make([]*graph.User, 0, 30)

	http.Handle("/graphql/playground", handler.Playground("GraphQL playground", "/query"))
...

resolver.go

...
type Resolver struct{}

// Users stands for the in-memory list of users
var Users []*User

func (r *mutationResolver) Signup(ctx context.Context, input NewUser) (string, error) {
...