It woudl be great to get data form myob essentials to power BI.
I cannot see where teh details of the API is myob essentials - it seems a bit light as far as API's, exporting csv's and integration ...
Glow1 have you looked through the developer site https://developer.myob.com/api/accountright/api-overview/authentication/
This has the information on how to connect to the Essentials API.