[day-03] create user schema

Add user type to represent entity in graphql.

lib/wabanex_web/schema/types/user.ex

@@ -0,0 +1,9 @@
+defmodule WabanexWeb.Schema.Types.User do
+  use Absinthe.Schema.Notation
+
+  @desc "Logic user representation"
+  object :user do
+    field :name, non_null(:string)
+    field :email, non_null(:string)
+  end
+end