/// <summary>
/// Checkout a gaming patron from an active gaming service.
/// </summary>
/// <param name="managerId">Manager ID</param>
/// <param name="serviceId">Target service ID</param>
/// <param name="patronId">Target patron ID</param>
public async Task CheckOutGamingPatron(string managerId, string serviceId, string patronId)
{
// Ensure the manager has access to the given service.
await _EnsureManagerCanAccessService(managerId, serviceId);
// Lookup service information.
var service = await _database.GetGamingServiceById(serviceId);
// Throw an exception if the service is not active.
if (!service.IsActive)
{
throw new ServiceIsNotActiveException();
}
// Checkout the gaming patron.
await _database.CheckOutGamingPatron(serviceId, patronId);
}