.NET Core API for ORM(Entity)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using accountapi.Models;
using accountapi.Repository;
using Microsoft.AspNetCore.Mvc;

namespace accountapi.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ValuesController : ControllerBase
    {
        private readonly AccountContent _context;

        public ValuesController( AccountContent context )
        {
            _context = context;

            if ( _context.Students.Count() == 0 )
            {
                // 테스트용
                // Create a new Student if collection is empty,
                // which means you can't delete all Student.
                _context.Students.Add(new Student { ID=0, FirstName = "ORM",LastName="Entity" });
                _context.SaveChanges();                
            }
        }

using accountapi.Repository;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace accountapi
{
    public class Startup
    {
        public Startup( IConfiguration configuration )
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices( IServiceCollection services )
        {
            services.AddDbContext<AccountContent>(opt =>
                opt.UseMySql("server=localhost;database=db_account;user=psmon;password=db1234"));            

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        }

    public class Startup
    {
        ........................
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure( IApplicationBuilder app, IHostingEnvironment env )
        {
            if ( env.IsDevelopment() )
            {
                using (var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope())
                {
                    var context = serviceScope.ServiceProvider.GetRequiredService<AccountContent>();
                    context.Database.EnsureDeleted();
                    context.Database.EnsureCreated();
                }
                app.UseDeveloperExceptionPage();               
            }
            app.UseMvc();
        }
    }