Please add Nigeria to the list of your supported countries, there are thousands of Nigerians, if not millions that are legit and hardworking that are willing to use your app to build and monitize, please give them a chance, it is a win win scenario for both parties.
Never ignore Nigerians in your commerce support, the may be your best customer, PayPal made this mistake, stripe,pay stack and others collected the market from them. You don’t abandon using a car because it can have accident, you put safety measures in place 
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This is a duplicate of Feature Request: Enable Hercules Commerce Access for Nigeria so I am marking this as closed. Please upvote the canonical link to follow along for when we add support