Call of Duty: Vanguard is installed through the Battle App. To be able to install you must log in to the Battle App using the Battle account you purchased or claimed your copy of the game on. If you purchased the game in the Battle Shop, your order must be complete.
With a Vanguard Personal Investor Account, you can buy or sell managed funds via Vanguard Online. Purchases or sales of managed fund units are subject to the terms and conditions of the relevant managed fund.