基础的netCore用EF连接MySql，一直报错，网上看了无数教程也不对，怎么解决？

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace myApi.Controllers
{
    [Produces("application/json")]
    [Route("api/[controller]/[action]")]
    [ApiController]
    public class UserController : ControllerBase
    {
        private readonly mydbContext _context;
        public UserController(mydbContext context)
        {
            this._context = context;
        }

        [HttpGet]
        public IActionResult Login()
        {
            return Ok("hello");
        }

        [HttpPost]
        public int Add()
        {
            members mm = new members();
            mm.name = "天才";
            _context.Set<members>().Add(mm);
            _context.SaveChanges();
            
            return 200;
        }
    }
}

报错如图所示

其他的配置文件如图

数据库文件