Banned users env, access validator, removed silent command, code quality improvements

src/config/contents.py

@@ -5,7 +5,6 @@ not_left = '{} did not join group `{}` before'
 mention_failed = 'There are no users to mention'
 no_groups = 'There are no groups for this chat'
 
-
 start_text = """
 Hello there
 I am @everyone\_mention\_bot
@@ -32,4 +31,4 @@ To display all members in a group:
 
 You can also try to tag me @everyone\_mention\_bot and then enter group name
 Possible results will be displayed
-"""
+"""

src/config/credentials.py

@@ -13,3 +13,5 @@ MONGODB_USERNAME = os.environ['MONGODB_USERNAME']
 MONGODB_PASSWORD = os.environ['MONGODB_PASSWORD']
 MONGODB_HOSTNAME = os.environ['MONGODB_HOSTNAME']
 MONGODB_PORT = os.environ['MONGODB_PORT']
+
+BANNED_USERS = os.environ['BANNED_USERS'].split(',') or []