First you have to enable the Teamtailor integration on the extension page in Oneflow, go to Account -> Extensions -> Enable Teamtailor.
Now click on "settings" and then select which collection/collections you want to be shown in Teamtailor.
When collections are chosen, the provider key will be generated. This key needs to be sent to Teamtailor support, email@example.com. They will update it in their system and activate your integration.
Create templates in Oneflow that you would like to use in Temtailor and specify template group as "Teamtailor" and click save.
Once the integration is activated by Teamtailor, you can start using the integration!
You need to have an account in Oneflow and an account in Teamtailor with the same email.