leaternrage/RiotLogin ? reverse-engineered prompt

Build me a lightweight Windows app that makes logging into Riot Games accounts faster and easier.

I want a simple, clean desktop interface where I can save a Riot account and then log in with a couple of clicks instead of typing everything every time. It should feel fast, use very little system resources, and be easy to understand for someone who just wants a convenient login tool.

Please make it in C# for Windows with a basic WinForms style app. Keep the UI simple and user friendly, with clear fields, buttons, and feedback when login succeeds or fails. If you need to look up current docs online, go ahead.

Also make sure the project opens cleanly in Visual Studio, builds without extra hassle, and includes the basic structure needed to run as a small standalone Windows utility.