.Net Core Web App Authentication with Azure B2C along with public identity provider like google.

1. To create a Azure B2C Tenant - https://docs.microsoft.com/en-gb/azure/active-directory-b2c/tutorial-create-tenant
   
2. To configure External identity provider - https://docs.microsoft.com/en-us/azure/active-directory-b2c/identity-provider-google
   
3. To register web app in Azure B2C - https://docs.microsoft.com/en-gb/azure/active-directory-b2c/tutorial-register-applications?tabs=app-reg-ga#register-a-web-application

Once Application gets registered updated the below configuraitons in applicaiton.json file.

{ "AzureAdB2C": { "Instance": "https://.b2clogin.com", "ClientId": "", "Domain": "", "SignUpSignInPolicyId": "", "ResetPasswordPolicyId":"", "EditProfilePolicyId":"" } }