Integrate Oauth 2.0 as a feature.
Oauth 2.0 has become the API authentication standard. While their are options to extend this functionality they are not super simple to integrate and using things like OKTA for a lot of companies gets expensive. OutSystems could aggregate this functionality into a standard function that just gets configured and allow clients to set this up from their own Service Studio/Service Center. This might be a challenge for On-Prem clients, but seems very feasible for cloud based clients. It might even be something that you charge for or use as a value add to drive clients to your cloud instead of On-Prem hosting.