Banking Transfer with CC-Number

i am currently working on a new Banking System for my fiveM Roleplay Server, i want the players to Transfer Money to each other with a Unique Creditcard Number. We are using esx.
So here is my first Question, how can i implement, that the server Generates a Unique Number with a fixed format and save that in the database.

And then how can i find the players ID threw the Creditcard number, is there a existing function, or should i use MySQL?

Thanks a lot!

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