Grafana Connection API

Dear Experts,

I am trying to connect my Grafana system with Hologram, but I am having some doubts how can I to create the database (parameters) with Hologram and to get the data using API, I have already try to connect a new database using SimpleJSon plugin, the connection using my user and password is complete, but when I try to get the data to dashboard does not work, any tips or how to handling with this?

Regards