Bozoma Saint John ’99 took the stage at Apple's annual Worldwide Developers Conference (WWDC), held this year in San Francisco, and stole the show. "It’s not just that Saint John, head of marketing for Apple Music, was a black female executive appearing onstage at WWDC. It was the way she commanded the room—and the show—that blew everyone away," wrote Davey Albey for Wired. Saint John, who spoke about Apple's streaming music service, which now has 15 million users, had led Apple Music’s marketing division since April 2014, when Apple acquired Beats, the company she had joined three months previously. Prior to that, she led…