add currentUser query

app/graphql/types/query_type.rb

@@ -4,14 +4,9 @@ module Types
     include GraphQL::Types::Relay::HasNodeField
     include GraphQL::Types::Relay::HasNodesField
 
-    # TODO: remove me
-    field :test_field, [String], null: false,
-      description: "An example field added by the generator"
-    def test_field
-      [
-        SecureRandom.uuid,
-        SecureRandom.uuid,
-      ]
+    field :current_user, UserType, null: true
+    def current_user
+      context[:current_user]
     end
   end
 end

app/graphql/types/user_type.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+module Types
+  class UserType < Types::BaseObject
+    # implements GraphQL::Types::Relay::Node
+
+    global_id_field :id
+
+    field :id, ID, null: false
+    field :first_name, String, null: false
+    field :last_name, String, null: false
+    field :full_name, String, null: false
+    field :email, String, null: false
+  end
+end