[hf] use primary twilio auth key in .env.dev
- CONTEXT: we changed
.env.dev
to use our secondary twilio api key under the thinking that this would be better compartmentalization - SYPTOM: registering numbers in dev env started to fail b/c twilio callbacks with signal verification codes were 401-ing
- CAUSE: the auth token they provided in the HTTP header didn't match what we were looking for, b/c they were providing the primary token and we were looking for the secondary one
- FIX: use the primary auth token in both prod and dev envs!