Charges a specific user an arbitrary amount (in USDC equivalent), if the user is connected and has sufficient balance.
This can be used for non-standard billing scenarios such as one-time feature unlocks or external usage tracking.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Optional user identifier provided by the developer.
Can be used instead of the user property in the request body to associate the API call with a specific end user.