/// <summary>
/// add as an asynchronous operation.
/// </summary>
/// <param name="employee">The employee.</param>
/// <param name="token">The cancellation token that can be used by other objects or threads to receive notice of cancellation.</param>
public Task <EmployeeModel> AddAsync(EmployeeModel employee, CancellationToken token)
{
token.ThrowIfCancellationRequested();
return(Task.Run(() => _emp.Update(employee)));
}
