This endpoint can be used to accept invites and create new members via domain matching.
If the Member is required to complete MFA to log in to the Organization, the returned value of member_authenticated will be false. The intermediate_session_token will not be consumed and instead will be returned in the response. The intermediate_session_token can be passed into the OTP SMS Authenticate endpoint to complete the MFA step and acquire a full member session. The intermediate_session_token can also be used with the Exchange Intermediate Session endpoint or the Create Organization via Discovery endpoint to join a different Organization or create a new one. The session_duration_minutes and session_custom_claims parameters will be ignored.