How to register on IATI?

You will require an IATI user account and a publisher account on the IATI Publisher Registry before you can complete the organisation’s settings in AidStream. If you don’t already have an account on IATI, the registry has provided a step-by-step guide to make it easier.

https://iatistandard.org/en/guidance/publishing-data/registering-and-managing-your-organisation-account/how-to-register-with-iati/