ReadonlyDefaultRole is an enumerated list of role names, each matching one of the LogScale predefined roles.

This enumerated datatype is used by the main datatype, Role. This is used by a few query fields (e.g., role() and roles), as well as the datatype AddRoleMutation, which is used by the mutation field, createRole(). Role is also used by several other datatypes, and thereby many mutation and query fields.