Roblox Army Game Rank Management Script

I'm working on an army game in Roblox and need a script that displays ranks on top of the player and shows in leaderboard . The script should allow me to change ranks and add and it comes with a command like .promote (user) which makes the user got 1 rank up and can only be executed by people who are the rank that will be changable or above. Key Requirements: - Displaying Ranks: The ranks should be displayed both above the player in-game and on the player's tab. - Customization: I want to be able to customize the ranks and add new ones easily. The customization process should be straightforward and intuitive. Ideal Skills and Experience: - Proficient in Lua and Roblox Studio. - Prior experience with creating robust rank management systems in Roblox games. - Ability to design an intuitive UI for managing and customizing the ranks. Please let me know if you have any questions or if you need more details.