Problem in validating the Data.Annotations

I'm creating a login screen in ASP.NET.Core MVC, and I'm using validations via Data.Annotations , however they are not being applied correctly on the screen.

Following codes:

View:

@model PCI.EV.Models.Clientes

    <script src='https://www.google.com/recaptcha/api.js'></script>
    <h2>ACESSE SUA CONTA</h2>
    <form asp-controller="Accounts" asp-action="Login" method="post">
        <div class="container">
            <div class="form-group">
                <label class="control-label" asp-for="CliCodigo">ID</label>
                <input type="text" asp-for="CliCodigo" class="form-control" />
                <span asp-validation-for="CliCodigo" class="text-danger"></span>
                </div>
                <div class="form-group">
                    <label class="control-label" asp-for="CliSenhaWeb">SENHA</label>
                    <br />
                    <input type="text" asp-for="CliSenhaWeb" class="form-control" />
                    <span asp-validation-for="CliSenhaWeb" class="text-danger"></span>
                    </div>
                    <br />
                    <div class="g-recaptcha" data-sitekey="6LcqFg8UAAAAADUK7coDHgoeTXEdJ9JQICdCyVcP">
                    </div>
                    <br />

                    <input type="submit" asp-action="FazerLogin" class="btn btn-primary" value="Login" />
                </div>

    </form> 

Controller:

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using PCI.EV.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace PCI.EV.Controllers
{
    public class AccountsController : Controller
    {
        private IConfiguration _config;

        public AccountsController(IConfiguration configuration)
        {
            _config = configuration;
        }

        public IActionResult Login()
        {
            return View();
        }
        [HttpPost]
        public IActionResult FazerLogin(Clientes cli)
        {
            if (ModelState.IsValid)
            {

            }
            return View("Login", cli);

        }
    }
}

Model

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace PCI.EV.Models
{
    public class Clientes
    {
        [Required(ErrorMessage = "Campo obrigatório")]
        public int CliCodigo { get; set; }

        [Required(ErrorMessage = "Campo obrigatório")]
        [DataType(DataType.Password)]
        [StringLength(10, MinimumLength = 4)]
        public string CliSenhaWeb { get; set; }


    }
}

Screen:

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