ISSUE #41: UPDATE top_users route

app/controllers/v1/users_controller.rb

@@ -178,9 +178,12 @@ class V1::UsersController < ApplicationController
     render status: :ok, json: response
   end
 
+  # GET /v1/top_users
   def show_top_users
-    # select id, level from users order by level desc limit 5;
-    users = paginate User.all.order("level DESC").limit(6)
+    # select users who are not admin and order by level, limit to 5 users
+    ids = User.joins(:roles_users).where(roles_users: {role_id: 3}).pluck(:user_id)
+    users = User.where.not(id: ids).order("level DESC").limit(5)
+
     render json: users
   end