title: oro commerce -Add multiple product by api
body: <p>I am new to OroCommerce, and it is quite difficult with the lack of documentation.</p>
  
  <p>I'm looking to create several products with the API, but I can't.</p>
  
  <p>I can only create one product at a time with the API "api / products" (POST method), but I don't see how to create several.</p>
  
  <p>Have you ever realized this?</p>
  
  <p>Best regards</p>