private async Task <bool> HandleShipUndocked(string message)
{
ShipDockedMessageEvent receivedShip = JsonSerializer.Deserialize <ShipDockedMessageEvent>(message);
Ship existingShip = await _refuelService.GetShipAsync(receivedShip.ShipId);
Console.WriteLine("Ship undocked: " + existingShip.Id);
await _refuelService.DeleteShipAsync(existingShip.Id);
return(true);
}