Well, they may have taken chloroquine during their infection with COVID-19, but that does not mean that the chloroquine was the cause. Believe me, I want this to be a magical cure. Then this would be over, saving lives. But you need to test the drug first with scientific equipment and people from the scientific community.
Chloroquine and hydroxychloroquine, just because they were taken during the infection and the cure, does not necessarily mean that it was the cure. You need to run tests that see if the chloroquine or hydroxychloroquine kills, nullifies the effects of, etc., of the virus.
Am I saying that hydroxychloroquine and chloroquine are not possible cures? No. They very much should be tested. But it is not confirmed yet.
Have a nice day. :)