in src/Amazon.AspNetCore.Identity.Cognito/CognitoUserManager.cs [255:265]
public override Task<IdentityResult> ChangePasswordAsync(TUser user, string currentPassword, string newPassword)
{
ThrowIfDisposed();
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
return _userStore.ChangePasswordAsync(user, currentPassword, newPassword, CancellationToken);
}