REST endpoint to generate Report access token for reports hosted in PowerBI service

I am trying to integrate the Power BI reports from Power BI service to my existing app which is not registered to AAD. I have one account that interacts with the Power BI service and I can pull the report metadata using the rest end point GET https://api.powerbi.com/beta/myorg/reports . However, the end user that sees the report using iFrame requires an access token. And, they don’t have AAD account. Is there a REST endpoint that allows to create a token for a specific report so that the EmbedUrl and the accessToken is returned to the UI for rendering?

I see it is supported in the PowerBI embedded using PowerBIToken.CreateReportEmbedToken.