Great addon, naming schemes missing

Thanks for this very useful addon!

What I am really missing is to define the format of the generated codes.

At least it should be possible to:
– define the length of the generated code
– specify a prefix

Optimally, you’d be able to write a format specifier like mycampaign$_{5}[a-z,0-9]

where $ refers to the number of the generated coupon and {n}[a-z,0-9] specifies a random string of n characters from the specified set of characters (could be similar to regular expressions, or something simpler like {n}[alphal/num/alphanum]).

Would you be able to add this? Thank you!