User registration example in iOS API doc is wrong

Please take a look at the example you provided (it would say backendless.userService, not backendless.messagingService):

https://backendless.com/documentation/users/ios/ : “User Registration”

-(void)userRegistration
{
BackendlessUser *user = [BackendlessUser new];
user.password = @iAmWatchingU";
[user setProperty:@“email” object:@“james.bond@mi6.co.uk”];

Responder *responder = [Responder responder:self
selResponseHandler:@selector(responseHandler:)
selErrorHandler:@selector(errorHandler:)];
[backendless.messagingService registering:user responder:responder];
}