Somethign Ryyst told me...

btc_tracker/kraken_fetch.py

@@ -74,8 +74,8 @@ def read_keys():
         with open(KEYSFILE, "w", encoding='utf-8') as nfile:
             print('You seem be lacking the users key file, created example for you. Exiting')
             json.dump(empty_userkeys_json, nfile)
-            raise EmptyUsersFile('Error')
-    return {}
+            raise FileNotFoundError
+        return {}
 
 def check_database():
     """