passing security token from the API and providing access in On prem shared point embed dashboard

Hi,

I have embadded my dashboard in On prem shared point,I wanted provided access  users(internal and external) who are part of CRM system . CRM system will provide a token - I have to pass this token  what would be the best way .

creating Dax code which will authenticate based on token and grant the dashboard access in on prem shared point  this is what in my mind . if any other suggestion or if any one implemented this kind of security please help.

thanks

Rao