public async Task <IHttpActionResult> DeleteById(string id)
{
if (string.IsNullOrEmpty(id) || !Guid.TryParse(id, out var _))
{
return(BadRequest());
}
var result = await _courseService.DeleteByIdAsync(id);
return(result.IsError ? BadRequest(result.Message) : (IHttpActionResult)Ok(result.Data));
}