backend controller and model code

This is code from my asp.net core backend on azure

-------------------------------------------------
CONTROLLER CODE: (Model is down below)
-------------------------------------------------

using System;
using Microsoft.AspNetCore.Mvc;
using temperatureCore.Models;

namespace temperatureCore.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class MeasurementsController : ControllerBase
    {
    
   private temperaturedbContext db = new temperaturedbContext();
            
    
      // Hae kaikki mittaukset
        [HttpGet]
        [Route("")]
        public List<Measurements> GetAll()
        {
            List<Measurements> measurements = context.Measurements.ToList();
            return measurements;
        }
        

        [HttpPost]
        [Route("")]
        public ActionResult CreateMeasurement([FromBody] Measurements mittaus)
        {
           try
            {
                mittaus.Time = DateTime.Now.AddHours(2); // Aikaleima laitetaan back-endissä, muut tulee IoT laitteesta
                //Päivitys: Lisätty 2h koska palvelinkone on Irlannissa.

                db.Measurements.Add(mittaus);
                db.SaveChanges();
                return Ok("Kiitos! Tallennettu id:llä " + mittaus.MeasurementId);
            }
            catch (Exception e)
            {
                return BadRequest("Jotain meni pieleen, mutta pyyntö tuli perille. Kts: " + e.GetType().Name + " : " + e.Message);
            }
            finally
            {
                db.Dispose();
            }

        }
    }
}
--------------------------------------------------------------------------
MODEL CODE: (Tämä vastaa tietokannan kenttiä)
-----------------------------------------------------------------------
using System;

namespace temperatureCore.Models
{
    public partial class Measurements
    {
        public int MeasurementId { get; set; }
        public string Sender { get; set; }
        public DateTime? Time { get; set; }
        public double? Temperature { get; set; }
        public double? Humidity { get; set; }
        public double? Pressure { get; set; }
    }
}