Please advise what to be put in the Request URL part of the screen shot in the left side ?

I saw this written in the OAuth 2.0 Playground: Note: The OAuth Playground will automatically revoke refresh tokens after 24h. You can avoid this by specifying your own application OAuth credentials using the Configuration panel. Although I’ve specified my own credentials, still my refresh token is being revoked after 24 hours. I do not want my refresh token to be revoked ever. How can I do this?

Team