In order to set up any integration in Clearstream, you will need to be either an Admin User or the Owner of your Clearstream account. Users with Editor permissions will not be able to set up or make changes to any integration.
You will also need to have certain privileges in CCB. You need to either:
Be the Master Admin.
Have the Edit System-Wide Settings Admin Privilege enabled on your CCB profile.
Once you have those permissions, you are ready to set up the integration by creating an API User in CCB.