curl -X DELETE -i --user AUTH_ID:AUTH_TOKEN \
    https://api.plivo.com/v1/Account/{auth_id}/Zentrunk/Credential/{credential_uuid}/
Permanently deletes an origination URI. API Endpoint
DELETE
https://api.plivo.com/v1/Account/{auth_id}/Zentrunk/URI/{URI_uuid}/

​
Arguments

No arguments need to be passed. 
curl -X DELETE -i --user AUTH_ID:AUTH_TOKEN \
    https://api.plivo.com/v1/Account/{auth_id}/Zentrunk/Credential/{credential_uuid}/