public IActionResult Post([FromBody]Label label)
 {
     try
     {
         return Ok(service.Createlabel(label));
     }
     catch (LabelAlreadyExistException laae)
     {
         return Conflict(laae.Message);
     }
     catch
     {
         return StatusCode((int)HttpStatusCode.InternalServerError);
     }
 }