add user api

app/controllers/api/users_controller.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Api
+  class UsersController < ApiBaseController
+    authorize_resource :current_user
+
+    def show
+      render json: current_user.as_json(only: %i[id first_name last_name email])
+    end
+  end
+end