social.colibri.beta.community.authorizeHost

Starts a sign-in as a community host account. The requesting user opens the returned URL, signs in as that account on its own server and allows the AppView to act for it. The AppView then adopts the account as a new community, or reconnects an existing community after its sign-in lapsed or its account moved. Poll getHostAuthorization with the returned request to learn the outcome.