protected virtual async Task <AuthenticateResult> ProcessNewExternalAccountAsync(string provider, string providerId, IEnumerable <Claim> claims)
{
var user = await TryGetExistingUserFromExternalProviderClaimsAsync(provider, claims);
if (user == null)
{
user = await InstantiateNewUserFromExternalProviderAsync(provider, providerId, claims);
if (user == null)
{
throw new InvalidOperationException("CreateNewAccountFromExternalProvider returned null");
}
var createResult = await _userStore.CreateAsync(user);
if (!createResult.Succeeded)
{
return(new AuthenticateResult(createResult.Errors.First()));
}
}
var externalLogin = new ExternalLoginInfo(provider, providerId);
var addExternalResult = await _userStore.AddLoginAsync(user.Id, externalLogin);
if (!addExternalResult.Succeeded)
{
return(new AuthenticateResult(addExternalResult.Errors.First()));
}
var result = await AccountCreatedFromExternalProviderAsync(user.Id, provider, providerId, claims);
if (result != null)
{
return(result);
}
return(await SignInFromExternalProviderAsync(user.Id, provider));
}