If you are an account owner, you can invite people who don't have a Celigo integrator.io account or you can invite users that already have their own accounts. If you invite users who already have accounts, they will need to transfer any integrations and flows they already have in their account to you prior to being able to accept your invite.
For more information on permissions, see Assign account level permissions.
Transfer ownership of account
If you need to make one someone else the owner of your account, you can transfer account ownership.