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# Added contact ID as an identifier in contacts route

You will now be able to use either the contact's `ID` or the `email` in Contacts API operations.

**NOTE:** This change is backward compatible *(i.e. you can continue using email to the queries)*

* Use contact `ID` or `email` as an identifier

  *Impacted routes:*

  * [https://developers.sendinblue.com/reference#getcontactinfo-1](https://developers.sendinblue.com/reference#getcontactinfo-1)
  * [https://developers.sendinblue.com/reference#updatecontact](https://developers.sendinblue.com/reference#updatecontact)
  * [https://developers.sendinblue.com/reference#deletecontact](https://developers.sendinblue.com/reference#deletecontact)
  * [https://developers.sendinblue.com/reference#getcontactstats](https://developers.sendinblue.com/reference#getcontactstats)

* Use either `ids` array or `emails` array (or `all` true - in case of removing contacts from the list)

  *Impacted routes:*

  * [https://developers.sendinblue.com/reference#addcontacttolist-1](https://developers.sendinblue.com/reference#addcontacttolist-1)
  * [https://developers.sendinblue.com/reference#removecontactfromlist](https://developers.sendinblue.com/reference#removecontactfromlist)