Feature/nat 410 add validator for tty number

gso/utils/helpers.py

@@ -280,8 +280,7 @@ def validate_tt_number(tt_number: str) -> str:
 
     :param str tt_number: The TT number as string to validate
 
-    :return str: The tt number string, if tt number match was successful, otherwise it will throw a ValueError
-    exception.
+    :return str: The TT number string if TT number match was successful, otherwise it will raise a ValueError.
     """
     pattern = r"^TT#\d{16}$"
     if not bool(re.match(pattern, tt_number)):