Cancel Parse cloud function callback

Question

This question is simple, but I didn't find it already asked ... Is there a way to cancel a Parse cloud function callback ?? I'm developing an app, where it would be great to ignore (or even better, not receive at all) the callback of a cloud function given certain events (like a log out).

I'm using cloudCode to retrieve an user New Messages, I'm doing that asynchronously. I would have to cancel that request if a user logs out, to avoid having the new messages from a user that is no longer logged in.

I've seen that, for example, on a PFQuery where we have a "Cancel" method to avoid the callback of the query, also for PFFiles there is a "cancel", but did not see anything like this for cloud functions .

Is there a way to do this ? to cancel the cloudCode request??

EDIT: Here the Objective-C code I'm using to call the function

[PFCloud callFunctionInBackground:"getNewMessages" withParameters:@{} block:^(id object, NSError *error) {
    if (!error) {
      NSArray *newMessages = (NSArray *)object;
      NSLog(@"*** %lu NEW MESSAGES FOUND", (unsigned long)newMessages.count);
    } else {
      NSLog(@"*** ERROR getting new messages: %@", error);
    }
}];

And this is the function in cloudCode

Parse.Cloud.define("getNewMessages", function(request, response) {
    var newMessagesQuery = new Parse.Query("Messages");
    newMessagesQuery.equalTo("receiver", request.user);
    newMessagesQuery.descending("createdAt");    
    newMessagesQuery.find().then(function(myNewMessages) {
            response.success(myNewMessages);
        },function(error) {
            console.error("Error getting new messages");
            response.success(error);
        });
});

Thanks!