Hi Devin,
The ClickDimensions Service User is technically determined on our end by using that User as our connection to your system. From your perspective, you can see in ClickDimensions Settings > Service Credentials who your Service User is, but it's definitely possible to have multiple Users with the qualifications to be the Service User. However, we only use one User at a time to link to your system.
If you need to change this, you can let us know in a ticket and we'll get an administrator to change who it for you. To be a Service User, you must meet the following requirements for everything to run smoothly:
-Time Zone (GMT) Universal Coordinated Time
-ClickDimensions Core, User, and Service Security Roles
-If possible, the ClickDimensions Service User should be the System Admin
-The user must be fully/Professional license with Read/Write access
Please let me know if you have questions!