Runs connection diagnostics against configured QuickBooks tenant. Both /api/v1/integrations/quickbooks/* and /api/v1/quickbooks/* map to the same ApiQuickBooksController method (testConnection). This family is a path alias that binds controller methods directly (for example `export const GET = controller.getAccounts()`) and relies on controller-level error handling.
Content type: application/json · schema QuickBooksV1ConnectionTestBody
clientInfoitemscustomersfullSuccess response 200 · schema QuickBooksV1ApiSuccess