Within the api.resources.stream is the invite method. This doesn’t add a user to the stream permissions until that user has accepted the invite and created account with the same email
invite( stream_id, email, user_id, role, message )
where stream_id {str} is the id of the stream to invite the user to
and you should use either:
email {str} as the email of the user to invite OR user_id {str} the id of the user to invite (only valid for users already active on the server)
role {str} is the role to assign to the user (defaults to stream:contributor)
and lastly message {str} which is the message to send along with this invite to the specified user
this method returns a bool if the invite sending was successful.
An invite_batch method is also available.
It has been previously requested that there could be a webhook event for when an invite has been accepted, I’ll check what the status/progress is on that.
Also a previous discussion for this for when you have control of the server:
In that thread, @Baris has a solution (with .NET) to register users directly. This is, again, not for the public speckle.xyz but where the server is self-hosted.