This is the most common scam in the industry. A stranger messages you promising explosive growth if you let them "manage" your account — they just need your login, or for you to add them. The moment you hand over access, they drain your earnings, lock you out, or hold the account hostage.
A legitimate manager or agency never needs your password; real arrangements use the platform’s own tools and a written contract. Treat any unsolicited management offer as a red flag, and read the platform’s acceptable use rules so you know what real partnerships look like.