I run an agency. How do we get access?

An agency never signs up on a creator's behalf. The creator invites you herself: Studio → Team → invitation link. You open the link, sign in or create an account and send your company details; a person at lalalust checks them, usually within two working days. She sees every step you take and can end the access with one click. An agency may help with planning and drafts. Writing to financiers is always her.