public class AccessPage
{
    [Key]
    public int Id { get; set; }
    public string RequestUri { get; set; }
    public bool IsActive { get; set; }
    [ForeignKey("UserRole")]
    public int UserRoleId { get; set; }
    public virtual UserRole UserRole { get; set; }
}

public class UserRole : IdentityUserRole<int>
{

}