Simplify Twilio integration

app/external_services.py

@@ -1,25 +1,18 @@
-from twilio.rest import Client
 from secrets import randbits
-from constants import ACCOUNT_ID, TOKEN, SMS_SENDER
+from twilio.rest import Client
+
+from constants import ACCOUNT_ID, SMS_SENDER, TOKEN
 from database.crud import save_otp
 
 
-def connect_api():
-    account_sid = ACCOUNT_ID
-    auth_token = TOKEN
+def create_twilio_client(account_sid, auth_token):
     client = Client(account_sid, auth_token)
     return client
 
 
-def generate_code():
-    bits = 16
-    code = randbits(bits)
-    return code
-
-
 def send_otp(receiver):
-    client = connect_api()
-    code = generate_code()
+    client = create_twilio_client(account_sid=ACCOUNT_ID, auth_token=TOKEN)
+    code = randbits(k=16)
     message = "Your OTP code is {0}".format(code)
     client.messages.create(to=receiver, from_=SMS_SENDER, body=message)
     save_otp(receiver, code)

app/routes.py

@@ -2,7 +2,7 @@ from fastapi import APIRouter, Depends, HTTPException, Response
 from sqlalchemy.orm import Session
 
 from app.schemas import *
-from app.twilio import send_otp
+from app.external_services import send_otp
 from database.crud import get_db, insert_data, verify_otp
 
 router = APIRouter()