feat: add endpoint for data manager to create/update/delete accounts
Part of #27 (closed)
Description
This MR creates a new API endpoint that will be used by the account-data-manager to create/update/delete accounts. The idea is that we will run a new Cloud Run instance that's only allowing internal traffic, meaning that only that account-data-manager can access this. We only expose this newly created API endpoint if DATA_MANAGER_ENABLED
is True
.