Is there Documentation how to connect Google Document Ai using Http Node

Describe the problem/error/question

What is the error message (if any)?

Please share your workflow

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)

Share the output returned by the last node

Information on your n8n setup

N8N Cloud

I’m trying to access Google Document Ai using n8N i tried Service Accounts doesn’t work. I tried OAuth2 doesn’t work. Please help. I just need my google doc with invoice to be passed to Google DOcument Ai. Connection is a nightmare atm. Strange no one tried this before