else {
 // Get the vendor identifier
 _appVendorId = identifier_for_vendor();
 
 
 // We're not running unit tests - use a background session
 // AppleDoc (currently 10.3) state that multiple background sessions with the same
 // identifier should never be created, so ensure that cannot happen by creating
 // a unique ID per instance.
 NSString *backgroundSessionId = [NSString stringWithFormat:kTSKBackgroundSessionIdentifierFormat,
 _appBundleId, [[NSUUID UUID] UUIDString]];
 
 NSURLSessionConfiguration *backgroundConfiguration = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:backgroundSessionId];
 backgroundConfiguration.discretionary = YES;
 backgroundConfiguration.sharedContainerIdentifier = sharedContainerIdentifier;
 
#if TARGET_OS_IPHONE
 // iOS-only settings
 // Do not wake up the App after completing the upload
 backgroundConfiguration.sessionSendsLaunchEvents = NO;
#if !TARGET_OS_TV && !TARGET_OS_WATCH
 // on iOS (but not tvOS or watchOS), enable multipath
 backgroundConfiguration.multipathServiceType = NSURLSessionMultipathServiceTypeHandover;
#endif
#endif
 
 // We have to use a delegate as background sessions can't use completion handlers
 _backgroundSession = [NSURLSession sessionWithConfiguration:backgroundConfiguration
 delegate:self
 delegateQueue:nil];
 }