Added check when adding friends to avoid multiple repeated entries (thx again to @JoeMama for finding this out)

calls.py

@@ -58,10 +58,11 @@ def add_friend(token, friend_uid):
         else:
             friends = {}
 
-        index = len(friends)
+        if friend_uid in friends.values():
+            return "Friend already in the list."
 
+        index = len(friends)
         friend_key = f"friend{index}"
-        if friend_key not in friends:
         friends[friend_key] = friend_uid 
         friends_json = json.dumps(friends)
 
@@ -70,8 +71,6 @@ def add_friend(token, friend_uid):
             (friends_json, token) 
         )
         conn.commit()
-        else:
-            return False
 
         return True
     except Exception as e: