is_in_person to true when the requester and signer are together and the
signer should complete the request on the requester’s device. Set this on the
signer when you
create the request.
Also set embed_url_external_user_id so the response includes embed_url and
iframeable_embed_url. Your app opens or embeds that URL to start the signing
session. For more information, see
Embed the signing client.

Create an in-person request
embed_url and iframeable_embed_url.
Later in-person signers in the same session do not need their own
embed_url_external_user_id.
Several signers in one session
After the first in-person signer finishes, the interface moves to the next in-person signer. The completed document is emailed to each signer.

