Field selects the claim field to be used as the created user's
organizations. If the field is the empty string, then no organization
updates will ever come from the OIDC provider.
mappingobject
Mapping maps from an OIDC claim --> Coder organization uuid
organization_assign_defaultboolean
AssignDefault will ensure the default org is always included
for every user, regardless of their claims. This preserves legacy behavior.