update multiple receivers. 🔐

Updates receivers if email existing<br/> <br/> Carefully use the fields 'registered', 'activated' and 'deactivated':<br/> <br/> - provide 'registered' with current time if receiver is new.<br/> - provide 'activated' only for immedite activation (no DOI mail will work then).<br/> - provide 'deactivated' other than 0 and your receiver will definitely be inactive. 0 will eventually reactivate receivers!<br/> Just omit 'deactivated' unless you know, what you are doing!<br/> <br/> <strong>Example Post Data:</strong><br/> <code> [<br/>     {<br/>         "email":"bruce@gotham.com",<br/>         "registered": "1118354400",<br/>         "activated": "1118354400", // omit if receiver is to be activated later, e.g. DOI mail<br/>         "source":"Batcave Computer",<br/>         "attributes": {<br/>             "is_batman":"1"<br/>         },<br/>         "global_attributes": {<br/>             "firstname":"Bruce",<br/>             "lastname":"Wayne"<br/>         },<br/>         "tags": [ "hero", "rich", "smart" ],<br/>         "orders": [<br/>             {<br/>                 "order_id": "xyz123412",<br/>                 "product_id": "SN9876543",<br/>                 "product": "Batman - The Movie (DVD)",<br/>                 "price": 9.99,<br/>                 "currency": "EUR",<br/>                 "quantity": 1,<br/>                 "mailing_id": "12345678"<br/>             },<br/>             {<br/>                 "order_id": "xyz123411",<br/>                 "product_id": "SN9876542",<br/>                 "product": "Batman - The Soundtrack (CD)",<br/>                 "price": 9.99,<br/>                 "currency": "EUR",<br/>                 "quantity": 1,<br/>                 "mailing_id": "12345678"<br/>             }<br/>         ]<br/>      }<br/>     , { ... additional user ... }<br/> ]<br/> </code>