API expert needed to Build a Dashboard for Ecommerce Company on GOOGLE DOCS or similar

We are an ecommerce company that uses a back end inventory and order management software called EcomDash.
We are wanting to create a dashboard for the business metrics that can be built on Google Docs/sheets or something similar.

YOU MUST HAVE EXPERIENCE BUILDING THIS TYPE OF DASHBOARD.

Here is the documentation for the API ----------

Please apply and ask intelligent questions about building this and explain how you would go about building it.

Thanks