query.go

var queryType = graphql.NewObject(graphql.ObjectConfig{
    Name: "Query",
    Fields: graphql.Fields{
        "account": &graphql.Field{
            Resolve: func(p graphql.ResolveParams) (interface{}, error) {
                return mydb.FindBriefById(p.Args["id"].(int))
            },
        },
    },
})