Apart from custom account types, there are four default account types that you can assign to a user in Sigma:
Administrator - This role can connect to new data sources and assign privileges to new users. This is a classic admin account type.
Creator - This role can create new workbooks, join next data sources, and upload CSVs. This account is usually for leaders and developers.
Explorer - This role can create and edit workbooks and interact with saved workbooks on Sigma. This account is usually for business analysts or data analysts.
Viewer - This role can view Sigma workbooks on Sigma. They have limited interactive abilities, and this account is usually for executives or general viewers.