To integrate with VKontakte, you need to create an app using the link https://dev.vk.com/ru/admin/connect-auth
In step 2, you must specify:
- Base domain - The name of your domain, for example superboard.ru
- Trusted Redirect URL - Link to the authorization handler from your website settings in the Profile section - Authorization Services - VKontakte
Congratulations! The authorization app has been created. Now specify the app ID and the Secure Key in your website