delete multiple receivers. 🔐

Delete receivers by given list of ids of emails<br/> <br/> <strong>Example Post Data:</strong><br/> <code> {<br/>     "receivers": [<br/>         "381940",<br/>         "dick.grayson@wayne.com",<br/>         "robin@gotham.com",<br/>         "3571983"<br/>     ],<br/>     "group_id": 271939<br/> } </code>