FiveM server IDs are recycled on every restart, which makes them useless for logs, sanctions or player records. Yesterday's player 12 is not today's. SF-UID assigns each player a permanent numeric ID tied to their licence and kept in the database. That ID never changes, whatever happens to the server. Eighteen exports let you use it anywhere in your own resources. Framework detection covers ESX, QBCore, QBX and QS, with a standalone fallback.