diff --git a/backend/services/messaging/message_service.py b/backend/services/messaging/message_service.py
index ff002aa3e9..cfe93cfb03 100644
--- a/backend/services/messaging/message_service.py
+++ b/backend/services/messaging/message_service.py
@@ -484,8 +484,10 @@ def send_team_join_notification(
         team_link = MessageService.get_team_link(team_name, team_id, False)
         user_link = MessageService.get_user_link(from_username)
         message.subject = f"You have been added to team {team_link}"
-        message.message = f"You have been added  to the team {team_link} as {role} by {user_link}.\
+        message.message = (
+            f"You have been added  to the team {team_link} as {role} by {user_link}.\
             Access the {team_link}'s page to view more info about this team."
+        )
 
         message.add_message()
         message.save()
diff --git a/backend/services/users/authentication_service.py b/backend/services/users/authentication_service.py
index 93fbd3852b..4223348dbd 100644
--- a/backend/services/users/authentication_service.py
+++ b/backend/services/users/authentication_service.py
@@ -14,7 +14,7 @@
 tm = TMAPIDecorators()
 
 UNICODE_ASCII_CHARACTER_SET = (
-    "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "0123456789" "-_"
+    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_"
 )