- Pass a `remember_me` query parameter along with the initial OAuth request, and
pick this parameter up during the omniauth callback from
request.env['omniauth.params']`.
- For 2FA-based login, copy the `remember_me` param from `omniauth.params` to
`params`, which the 2FA process will pick up.
- For non-2FA-based login, simply call the `remember_me` devise method to set
the session cookie.
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