productSalesChannels
Retrieves sales channels information for a specific product.
Authentication & Permissions
Requires authentication and products:read_sales_channels permission for the
product's brand.
Possible Errors
- **Product not found**: Invalid or non-existent product ID
- **Access denied**: Insufficient permissions for the product's brand
productSalesChannels(
productId: ID!
): [ProductSalesChannel!]!