ASP.NET Identity reset password

**Best way to Reset Password in Asp.Net Core Identity use for Web API.**

*Note** *: Error() and Result() are created for internal use. You can return you want.*

[HttpPost]
[Route("reset-password")]
public async Task<IActionResult> ResetPassword(ResetPasswordModel model)
{
if (!ModelState.IsValid)
return BadRequest(ModelState);
try
{
if (model is null)
return Error("No data found!");


var user = await _userManager.FindByIdAsync(AppCommon.ToString(GetUserId()));
if (user == null)
return Error("No user found!");

Microsoft.AspNetCore.Identity.SignInResult checkOldPassword =
await _signInManager.PasswordSignInAsync(user.UserName, model.OldPassword, false, false);

if (!checkOldPassword.Succeeded)
return Error("Old password does not matched.");

string resetToken = await _userManager.GeneratePasswordResetTokenAsync(user);
if (string.IsNullOrEmpty(resetToken))
return Error("Error while generating reset token.");

var result = await _userManager.ResetPasswordAsync(user, resetToken, model.Password);

if (result.Succeeded)
return Result();
else
return Error();
}
catch (Exception ex)
{
return Error(ex);
}
}