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when users use their affiliate credits they earned
they get the options in checkout and cart to reduct it wich is good but it doesnt reduct the shipping cost, can one activiate so the points also reduce shiping cost if you have enough points.
now
my test users has 5 dollar credits
item i try buy cost 4.5 and shiping 0,5
the credits only remove the 4,5 dollars and saves 0,5 because its shipping cost it dont remove. i want it to remove even shipping if one have enough points