Callback URL

(This is not a feature request! it's the only option to choose from)
When connecting to Twitter I get directed to the Authorization web page and then I'm told to go back to my app to Enter A Pin. Your Docs say provide a call back URL. The call back url option is only available under the enable '3rd party authentication' section of the twitter site
1: That's not a facility that we need to provide.
2: Still prompted for a pin even when it has a URL entered - where could I provide the pin using your component?

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Thank you.