public AppCommandHandler(
IAggregateHandler handler,
IAppRepository appRepository,
IUserRepository userRepository,
ClientKeyGenerator keyGenerator)
{
Guard.NotNull(handler, nameof(handler));
Guard.NotNull(keyGenerator, nameof(keyGenerator));
Guard.NotNull(appRepository, nameof(appRepository));
Guard.NotNull(userRepository, nameof(userRepository));
this.handler = handler;
this.keyGenerator = keyGenerator;
this.appRepository = appRepository;
this.userRepository = userRepository;
}