Is there any way to solve the ConfirmEmailAsync(TUser user, string token) NullReferenceException while using Amazon.AspNetCore.Identity.Cognito?

Question

I am using Amazon.AspNetCore.Identity.Cognito and while using "ConfirmEmailAsync(TUser user, string token)" of UserManager, I am getting the NullReferenceException.

The Screenshot is provided:

The Code I did:

[HttpPost]
[ActionName("Confirm")]
public async Task<IActionResult> Confirm_Post(ConfirmModel model)
{
    if(ModelState.IsValid)
    {
        var user = await _userManager.FindByEmailAsync(model.Email);
        if(user == null)
        {
            ModelState.AddModelError("NotFound", "A user with given email address was not found");
        }

        var result = await _userManager.ConfirmEmailAsync(user, model.Code).ConfigureAwait(false);
        if(result.Succeeded)
        {
            return RedirectToAction("Index", "Home");
        }
        else
        {
            foreach(var item in result.Errors)
            {
                ModelState.AddModelError(item.Code, item.Description);
            }
        }
    }
}

Please tell me how to solve this, as I am new to AWS, it seems puzzling.

Answer 1

Okay I get a solution, now it no more causes the exception. I use ConfirmSignUpAsync(TUser user, string confirmationCode, bool forcedAliasCreation) method instead of ConfirmEmailAsync(TUser user, string token) and it works!!

var result = await ((CognitoUserManager<CognitoUser>)_userManager).ConfirmSignUpAsync(user, model.Code, true);
if(result.Succeeded)
{
     return RedirectToAction("Index", "Home");
}

The code is shared below, and if anyone finds it helpful, it'd be a pleasure. Thanks all!!