Marks a saved payout account as the user’s default. Only one account can be default at a time.
The default account is used for:
auto_withdraw = true on the walletPOST /wallet-withdraw when no payout_account_id or
one_time_payout is providedJWT access token obtained from /auth-verify (login context) or /auth-signup. Set the bearer_token environment variable in your API client to apply it globally.
ID of the payout account to make default
"a1b2c3d4-e5f6-7890-abcd-ef1234567890"