如何在abp.io中从后台代码登录？

using Abp.Authorization;
using Abp.Identity;

public class LoginAppService : ApplicationService
{
    private readonly UserManager _userManager;
    private readonly SignInManager _signInManager;

    public LoginAppService(UserManager userManager, SignInManager signInManager)
    {
        _userManager = userManager;
        _signInManager = signInManager;
    }

    public async Task Login(string username, string password)
    {
        var user = await _userManager.FindByUsernameAsync(username);
        if (user != null)
        {
            var result = await _signInManager.CheckPasswordAsync(user, password);
            if (result.Succeeded)
            {
                await _signInManager.SignInAsync(user, false); // 设置为true可以记住用户的登录状态
                // 登录成功后的逻辑，例如重定向到主页
            }
            else
            {
                // 密码错误的逻辑
            }
        }
        else
        {
            // 用户不存在的逻辑
        }
    }
}