private async Task <IActionResult> HandleMerge(IdentityUser user, string returnUrl)
{
var currentUser = await _userManager.GetUserAsync(User);
if (user == null || currentUser == null)
{
StatusMessage = "An error occured.";
return(RedirectToPage("Merge"));
}
if (user.Id == currentUser.Id)
{
StatusMessage = "That login is already associated with this account!";
return(RedirectToPage("Merge"));
}
await _mergeService.MergeUsers(currentUser, user);
// delete temporary cookie used during external authentication
await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);
var updatedUser = await _userManager.GetUserAsync(User);
await _signInManager.SignInAsync(updatedUser, isPersistent : false);
return(ReturnToUrl(returnUrl));
}