public async Task <bool> ClaimAsync(string userId, string id)
{
var device = await deviceRepository.GetAsync(id);
if (null == device)
{
device = await deviceRepository.CreateAsync(id);
}
if (device.UserId == userId)
{
return(true);
}
if (device.UserId != null)
{
return(false);
}
await deviceRepository.ClaimAsync(id, userId);
return(true);
}