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I'm looking for a module which is already made or someone to be able to make us one to generate multiple coupons for a product.
Please DM me if you can help.
Ask RackNerd, they aced it.
Seriously thou, you don't need any module.
Generate any amount in MySQL, and read here:
If you want something really fancy, then this:
VA on Upwork
check ModulesGarden as they do offer WHMCS development.