At the beginning we had a banner on the dashboard with a CTA to book a call with me. To incentivize users to book the call, we offered free API credits: https://twitter.com/PierreDeWulf/status/1329765250707623939/...
I had 100+ calls with users in the first months, it helped us a lot to understand our market, what they needed etc.
It worked so well that we had to remove the free credit incentive because taking those calls took all my time.