While Pokémon GO has become a major phenomenon in less than a week, researcher Adam Reeve has noted a major flaw in the game, calling Pokémon GO “a huge security risk.” Pokémon GO players have two ways to sign on to the game — through a Google account, or a Pokémon Trainer Club account. The latter is having major problems, so most users are signing on using their Google account. And as Reeve points out, for some iOS users, Pokémon…