How can I create multiple unique coupon with same discount?

I have 90 members and I would like to have 90 unique coupon codes, specific to each person all with the same discount. Is there a way I can just copy and paste these codes into the coupon code field (maybe separated with a comma or something)?

You can not add multiple coupon code by adding comma to one after another.

What you can do is you can duplicate a coupon with the same discount and change the coupon code accordingly.

Please refer to the following screencast:

Hope this will help.

Let us know if you have any further query.