如何在不同的控制器

Question

当使用mvc身份时，我有三个数据库，并且所有人都有用户表，在startup.cs中有一个默认的UserManager和SignInManager，如何在不同的控制器中添加另一个UserManager和SignInManager？（我的意思是我在项目中有不同的登录页面，比如accountAcontroller，accountBcontroller，这个控制器有不同的登录视图）

private readonly UserManager<ApplicationUser> _userManager;
        private readonly SignInManager<ApplicationUser> _signInManager;
        private readonly ApplicationDbContext _dbContent;
        private readonly IEmailSender _emailSender;
        private readonly ISmsSender _smsSender;
        private readonly ILogger _logger;

        public AccountController(
            UserManager<ApplicationUser> userManager,
            SignInManager<ApplicationUser> signInManager,
            IEmailSender emailSender,
            ISmsSender smsSender,
            ILoggerFactory loggerFactory,
            ApplicationDbContext Dbcontext
            )
        {
            _userManager = userManager;
            _signInManager = signInManager;
            _emailSender = emailSender;
            _smsSender = smsSender;
            _logger = loggerFactory.CreateLogger<AccountController>();
            _dbContent = Dbcontext;
        }