post https://api.phone.com/v4/accounts//oauth/clients//redirect-uris
The Account OAuth Clients API supports redirect-uri. Since an OAuth Client is created by a Phone.com admin who does not know what redirect uris should be assigned, API users may use the OAuth Client Redirect URIs API to create, list, get and delete redirect uris.
Create an OAuth Client Redirect URI record. Your token should have 'oauth-management' scope to perform this request.