post
https://api.preprod.rofim.doctor/services/interoperability/users/shadow
Creates a shadow user in the system. Shadow users are users created by an interoperable client that exist only in the context of that client. If a user with the same externalId already exists, the existing user will be returned without creating a new one. The matching is done based on the externalId field, which must be unique per interoperable client.