Connection refused when connecting postgres and supabase to n8n

Hello, I am currently trying to connect n8n to my supabase stack. Everything is running in docker on ubuntu 24.04. Everything is on the same machine on separate docker containers. I'm not sure is permissions are the issue, but when I am point to a local host (127.0.0.1) I get connection refused. Same issue when connecting supabase, I know my credentials are correct, my username should be default. I am just wondering if there is a setting somewhere securing the port to inside it's own docker container network, and if so, how I can disable it? Thanks in advance.
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