Query Splitgraph with Google Data Studio
You will need the server's root certificate to set up the connection. You will also need a client certificate pair: this can be self-signed.
openssl req -newkey rsa:2048 -nodes -keyout client.key -x509 -days 365 -out client.crt
Note that, due to a bug in Data Studio, you must upload your key to the "certificate" field, and your certificate to the "key" field.
Data discovery doesn't completely work on Google Data Studio, as it treats all tables as being in the public schema and doesn't schema-qualify them when making queries from the table picker. You can still use a custom query to import data into Google Data Studio.