Solid App Authorization

Hello Solid WC!
    I have been working on https://solid.vip today, which is a project to
build a user profile by combining public information from existing social
media accounts (LinkedIn, GitHub, Twitter, Facebook, and Google) and
putting the information on a single-page profile.  My own user profile
looks like this: http://mpigott.solid.vip/.
    The next feature I would like to add is to allow the user to import the
data into a Solid POD.  However, I am not sure what the preferred way to
authenticate an application is; it seems like much of the Solid platform is
still in flux.  Is there a recommended spec I should follow (WebID-TLS,
WebID-OIDC, DID) in order to allow someone with a Solid POD to import the
data from the generated profile?

Thanks!
Mike