Pushing a db from my local computer via the command line

Greetings!
I am hoping to use Aiven to set up very simple, almost no use psql db. It currently exists only on my local computer. I have been trying to use pg_dump O, along with the link to my Aiven db. Unfortunately I am unable to get the connection to work. How should I be pushing a db from my local compute to Aiven from the command line?

Thank you!