Docs for primary_role_id param#650

bryannielsen merged 2 commits intorelease/7.4.0ExpressionEngine/ExpressionEngine-User-Guide:release/7.4.0from

feature/7.x/primary-role-id-paramExpressionEngine/ExpressionEngine-User-Guide:feature/7.x/primary-role-id-paramCopy head branch name to clipboard