feat: implement subscriber info retrieval

lib/plugins/sms/twilio/twilio.js

@@ -37,7 +37,27 @@ function sendMessage (account, rec) {
     })
 }
 
+function getLookup (account, number) {
+  return Promise.resolve()
+    .then(() => {
+      const client = twilio(account.accountSid, account.authToken)
+      return client.lookups.v1.phoneNumbers(number)
+        .fetch({ addOns: ['lamassu_ekata'] })
+    })
+    .then(info => info.addOns.results['lamassu_ekata'])
+    .catch(err => {
+      if (_.includes(err.code, BAD_NUMBER_CODES)) {
+        const badNumberError = new Error(err.message)
+        badNumberError.name = 'BadNumberError'
+        throw badNumberError
+      }
+
+      throw new Error(`Twilio error: ${err.message}`)
+    })
+}
+
 module.exports = {
   NAME,
-  sendMessage
+  sendMessage,
+  getLookup
 }