private async Task deleteAllPreviousData(CTUClient client)
{
List <Client.Json.CtuWirelessUnit> toRemove = await client.GetMyStationsAsync();
List <string> alreadyRemoved = new List <string>();
foreach (var item in toRemove)
{
if (!alreadyRemoved.Contains(item.Id))
{
await client.DeleteConnectionAsync(item.Id);
alreadyRemoved.Add(item.IdStationPair);
}
}
}
