Every new user must be approved to access the service by another user from the same organisation. After registration, other users in the organisation will receive an email notification that a new user is waiting for approval. Sometimes the approval request might be overlooked by your organisation. If you know someone else in your organisation, you can ask them to approve your request.
If you don't know other users, or if there are no other users due to staff changes, feel free to contact fintegrate.fi support immediately after registering: fintegrate(a)ely-keskus.fi.