MVC注册和登录模型--有多少？

Question

我已经创建了一个“注册新用户表单”，并使用以下模型：

namespace FREELANCER.Models
{
    [Bind(Exclude = "UserID")]
    public class UserModel
    {
        [ScaffoldColumn(false)]
        public int UserID{ get; set; }

        [Display(Name = "Fornavn")]
        [Required(ErrorMessage = "Skriv venligst dit fornavn", AllowEmptyStrings = false)]
        [RegularExpression(@"(^[a-zA-Z æøåÆØÅ]{0,25}$)", ErrorMessage = "Fornavn skal bestå af 2-25 bogstaver")]
        public string FirstName { get; set; }

        [Display(Name = "Efternavn")]
        [Required(ErrorMessage = "Skriv venligst dit efternavn", AllowEmptyStrings = false)]
        [RegularExpression(@"(^[a-zA-Z æøåÆØÅ]{0,25}$)", ErrorMessage = "Efternavn skal bestå af 2-25 bogstaver.")]
        public string LastName{ get; set; }


        [Display(Name = "Telefonnummer")]
        [RegularExpression("(^[0-9]{8}$)", ErrorMessage = "Telefon skal bestå af 8 tal.")]
        public string Phone{get; set; }

        [Display(Name = "Kodeord")]
        [Required(ErrorMessage = "Skriv venligst et kodeord", AllowEmptyStrings = false)]
        [DataType(DataType.Password)]
        [StringLength(8, MinimumLength = 4, ErrorMessage = "Kodeordet skal mindst bestå af 4-8 karakter.")]
        public string Password { get; set; }

        [Display(Name = "E-mailadresse")]
        [Required(ErrorMessage = "Skriv venligst din e-mailadresse", AllowEmptyStrings = false)]
        [EmailAddress(ErrorMessage = "Ugyldig e-mailadresse")]
        [Remote("DoUserExist","Home",ErrorMessage = "E-mail already in use")]
        [DataType(DataType.EmailAddress)]
        public string Emailaddress{ get; set; }

        [Display(Name = "By")]
        [Required(ErrorMessage = "Vælg en by", AllowEmptyStrings = false)]
        public int CityID { get; set; }

        public int EmailID { get; set; }

        [Display(Name = "Nyhedsbrev")]
        public bool SubscribeToNewsletter{ get; set; }

        [ScaffoldColumn(false)]
        public DateTime UserCreated{ get; set; }

    }
}

现在我想创建一个登录表单，它必须是：

Textbox (电子邮件地址) Textbox (密码) Subtmit_button

我应该为它创建一个新的模型还是使用UserModel？

public class LoginModel
{
public string Emailadress {get ; set ;}
public string Password {get ; set ;}
}

MVC模型的概念把我搞糊涂了，请帮帮忙！