ASP.NET Identity Login Error

var result = await _signInManager.PasswordSignInAsync(
    user,
    Input.Password,
    Input.RememberMe,
    lockoutOnFailure: false
);

public class ApplicationUser : IdentityUser
{
    [Required(ErrorMessage = "First name is required")]
    [Display(Name = "First Name")]
    [MaxLength(50)]
    public string FirstName { get; set; }

    [Required(ErrorMessage = "Last name is required")]
    [Display(Name = "Last Name")]
    [MaxLength(50)]
    public string LastName { get; set; }

    public virtual ICollection<ApplicationUserClaim> Claims { get; set; }

    public virtual ICollection<IdentityUserLogin<string>> Logins { get; set; }

    public virtual ICollection<IdentityUserToken<string>> Tokens { get; set; }
}

public class ApplicationRole : IdentityRole
{
}

public class ApplicationUserRole : IdentityUserRole<string>
{
    public bool IsReadOnly { get; set; }

    public string ProgramId { get; set; }

    public bool IsDefault { get; set; }

    public virtual TestProgram Program { get; set; }
}

public class ApplicationRoleClaim : IdentityRoleClaim<string>
{
    public virtual ApplicationRole Role { get; set; }
}

public class ApplicationUserClaim : IdentityUserClaim<string>
{
    public virtual ApplicationUser User { get; set; }
}

public partial class ApplicationDbContext : IdentityDbContext<
    ApplicationUser, ApplicationRole, string,
    ApplicationUserClaim, ApplicationUserRole, IdentityUserLogin<string>,
    ApplicationRoleClaim, IdentityUserToken<string>>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
    : base(options)
    {
    }

    /// DbSets

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);