Use signals to save ip, user_agent, last_login in sessions

utils/captcha/__init__.py

@@ -15,7 +15,6 @@ import os
 import time
 import random
 
-from io import BytesIO
 from PIL import Image, ImageDraw, ImageFont
 
 

utils/captcha/views.py

@@ -1,5 +1,3 @@
-from base64 import b64encode
-
 from . import Captcha
 from ..api import APIView
 from ..shortcuts import img2base64