TOPSHOT - A shoe vendor sits in his shop in the Ariaria International Market, famous for shoe making and leather work, in Aba, a city in one of the pro-Biafran separatist regions on February 14, 2019. - Nigerians are scheduled to cast their ballots on February 16, in presidential and legislative elections. The presidential contest will see incumbent Muhammadu Buhari seek to win a second four-year term against former vice president Atiku Abubakar. (Photo by CRISTINA ALDEHUELA / AFP)