Grab credentials from env vars

bot.py

@@ -2,11 +2,12 @@ if __name__ == '__main__':
     print('Run main.py instead.')
     exit(1)
 
+import os
 import time
 
-USERNAME = ''
-PASSWORD = ''
-SERVER = ''
+USERNAME = os.environ['USERNAME']
+PASSWORD = os.environ['PASSWORD']
+SERVER = os.environ['SERVER']
 
 from custom.managers import DataManager, ChunksManager, ChatManager