If you'd like to learn more about legitimate game development: (how to use Luau) DataStores (saving player ranks) Official HD Admin customization
If you are looking to manage your own Roblox experience, here is how to set up admin ranks safely and legitimately: Using Official Admin Systems *FE* HD ADMIN RANKER SCRIPT | Get Owner Rank | ...
Using exploit-based scripts can lead to permanent account termination by Roblox. If you'd like to learn more about legitimate
The use of scripts to gain unauthorized "Owner" ranks or bypass filtering (FE) in Roblox experiences violates the Roblox Terms of Use. These tools often contain malicious code designed to compromise your account or personal data. *FE* HD ADMIN RANKER SCRIPT | Get Owner Rank | ...
Once inserted into your game, you can configure ranks via the "Settings" script.