internal async Task PurgeDataAsync()
{
IPlatform platform = DependencyService.Get <IPlatform>();
await vehicleTableSync.PurgeFilesAsync();
await vehicleTableSync.PurgeAsync(QueryVehicleString, null, true, CancellationToken.None);
await claimTableSync.PurgeFilesAsync();
await claimTableSync.PurgeAsync(QueryClaimString, null, true, CancellationToken.None);
//delete downloaded files
await FileHelper.DeleteLocalPathAsync(await platform.GetDataFilesPath());
}