- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
   if (editingStyle == UITableViewCellEditingStyleDelete) {
      [self.usersTable beginUpdates];
      UITableViewCell *cell = (UITableViewCell *)[self.usersTable cellForRowAtIndexPath:indexPath];
      NSString *userNameToDelete = cell.textLabel.text;
      // Data source
      [self.appDict removeObjectForKey:userNameToDelete];
      self.arrayOfUserNames = [[NSMutableArray alloc] initWithArray:[self.appDict allKeys]];
      [self.appDict writeToFile:self.pathOfAppFile atomically:YES];
      // Deleting cell
      [self.usersTable deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]  withRowAnimation:UITableViewRowAnimationFade];
      [self.usersTable endUpdates];
   }
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == [self.arrayOfUserNames count]) {
   return NO;
}
else {
   return YES;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
   return [self.arrayOfUserNames count] + 1;
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        //delete your user record
    }
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
   if (editingStyle == UITableViewCellEditingStyleDelete) {

      NSString *userNameToDelete = [[self arrayOfUserNames] objectAtIndex:indexPath.row];
      // Data source
      [self.appDict removeObjectForKey:userNameToDelete];
      self.arrayOfUserNames = [[NSMutableArray alloc] initWithArray:[self.appDict allKeys]];
      [self.appDict writeToFile:self.pathOfAppFile atomically:YES];

      [tableView reloadData];


   }
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath