Create Stripe-Source on connected account

stripe-source.php

<?php
            $stripeConnectedAccount = Account::retrieve("acct_XXX");

            $stripeConnectedAccountSource = Source::create([
            "type" => "sepa_debit",
            "sepa_debit" => ["iban" => "DE89370400440532013000"],
            "currency" => "eur",
            "owner" => [
                "name" => $localCustomer->full_name,
            ],
            "mandate" => [
                "acceptance" => [
                    "status" => "accepted",
                    "date" => $timestamp,
                    "ip"    => $clientIp,
                    "online" => [
                        "date" => $timestamp,
                        "ip"    => $clientIp,
                        "user_agent" => $clientUserAgent
                    ],
                    "type" => "online",
                    "user_agent" => $clientUserAgent
                ]
            ],
            "usage" => "reusable"
        ], ["stripe_account" => $stripeConnectedAccount->id]);