Issue to Create Dataset API for on premise

I am trying to create dataset (API) using postgres

"connectionString":"Data Source=postgresql://localhost/Postgres?user=other&password=secret;Initial Catalog=Postgres;Cube=Model"

And m getting 202 response in postman but in PowerBi desktop getting issue
"This Data source can not be accessed by data gateway server:"postgresql://localhost/Postgres?user=other&password=secret;"

Any other way to do this .

Thanks In advance