1.3.6.1.4.1.61536.1.1.1.1: Stable Actor Identifier
OID 1.3.6.1.4.1.61536.1.1.1.1 can be used as a Uniform Resource Name (URN) as follows:
urn:oid:1.3.6.1.4.1.61536.1.1.1.1
This OID identifies the custom OIDC claim used by polyproto home servers to correlate
OIDC-authenticated sessions with SCIM-provisioned actor accounts. The IdP must include this claim in
issued tokens, set to the same value as the SCIM externalId for that user. The name of this claim
is the OID in URN form (urn:oid:1.3.6.1.4.1.61536.1.1.1.1), as defined above.