public async Task <IActionResult> ForDepartment([FromQuery] string departmentId, [FromQuery] string roomNumber, CancellationToken token)
{
var query = new EmployeesQuery();
if (!string.IsNullOrWhiteSpace(departmentId))
{
query = query.ForDepartment(departmentId);
}
if (!string.IsNullOrWhiteSpace(roomNumber))
{
query = query.ForRoom(roomNumber);
}
var employees = await this.LoadEmployeesAsync(query, token);
return(this.Ok(employees));
}