Renamed function to better reflect it's function

ref #39

src/controllers/UserController.ts

@@ -84,7 +84,7 @@ export class UserController {
 		if (oldUser.id != updateUser.id) {
 			throw new UserIdsNotMatchingError();
 		}
-		await this.userRepository.save(await updateUser.toUser(oldUser));
+		await this.userRepository.save(await updateUser.updateUser(oldUser));
 
 		return new ResponseUser(await this.userRepository.findOne({ id: id }, { relations: ['permissions', 'groups'] }));
 	}