Create a Reviewer

Hi! In some cases, I would like to send a document package with no signers but only reviewers. Those users will only have to "review" the document without signing it. I have tried to keep the users as "Signers" but below is the error message I am getting: "{\"messageKey\":\"error.validation.sendPackage.noApprovals\",\"message\":\"Cannot send package without approvals.\",\"code\":400,\"name\":\"Validation Error\"}" Should I ad them as placeholders instead ? I havent found a "Reviewer" category. I looked on this forum and this is the closest topic I found and it suggests that it's not possible :-(, tell me I'm wrong please! (https://developer.esignlive.com/forums/topic/package-reviewer-use-case/) Thanks Frederic