Add viewer ACL for DSR or LiveSend

put https://api.seismic.com/dsr/v1/{engagementType}/{id}/viewerACL/{userIdentifier}

Add viewer ACL(Access Control List) to a given LiveSend or DSR(Digital Sales Room) link. If some user has an account in the customer’s SSO but is not a recipient for the link or not in the ACL, then that user cannot open the link. The LiveSend or DSR ID can be extracted from the DSR or LiveSend link. This API can be used in conjunction with the Link Generation API.
Examples of how to locate the LiveSend or DSR ID in a link:

For a DSR link: https://tenant.seismic.com/ls/9422fa23-c186-4036-82d4-ac3be1af9b83/{DSR ID}
For a LiveSend link: https://tenant.seismic.com/i/{LiveSend ID}