Extract env + Twilio utils; shrink index

src/twilio/client.ts

@@ -0,0 +1,14 @@
+import Twilio from "twilio";
+import type { EnvConfig } from "../env.js";
+
+export function createClient(env: EnvConfig) {
+	// Twilio client using either auth token or API key/secret.
+	if ("authToken" in env.auth) {
+		return Twilio(env.accountSid, env.auth.authToken, {
+			accountSid: env.accountSid,
+		});
+	}
+	return Twilio(env.auth.apiKey, env.auth.apiSecret, {
+		accountSid: env.accountSid,
+	});
+}