branch link creation

 NSDictionary *param = @{@"sourceId" : sourceId,
                            @"source" : sourceType,
                            @"referral" : [[SecurePersistentStore sharedInstance] referralKey],
                            @"$og_image_url" : imageUrl,
                            @"$og_description" : caption,
                            @"$og_title" : @"PocketCause"};

    [[Branch getInstance] getShortURLWithParams:param
                                     andChannel:@"mobile_app"
                                     andFeature:@"share_profile"
                                    andCallback:^(NSString *url, NSError *error) {
                                        [self hideLoadingView];
                                        if (!error) {
                                            NSURL *shareUrl = [NSURL URLWithString:url];

                                            PostURLShareItem *urlItem = [[PostURLShareItem alloc] initWithURL:shareUrl];
                                            PostCaptionShareItem *captionItem = [[PostCaptionShareItem alloc] initWithCaption:caption andURL:shareUrl.absoluteString];

                                            [self presentActivityWithURLShareItem:urlItem
                                                                 captionShareItem:captionItem
                                                              completitionHandelr:handler];
                                        }
                                    }];