I have managed to generate Swagger data from my site no problem using the docs found HERE
I go to https://example.com/swagger?store=all ( obviously with my site instead ) and even authorise it. The swagger data appears - but there is no catalog-data-product-interface which is referenced from the REST Api endpoint Docs HERE ( Products/ Post ) . The resources allowed in API for my user is ALL - but I can't seem to see the model for products anywhere
