Fixed missing special characters that can occur in an ExponentToken

src/validator.py

@@ -16,7 +16,7 @@ def is_valid_token(token: str) -> bool:
 	Validates the format ExponentPushToken[<22-letter-long-string>]
 	"""
 
-	pattern = r"^ExponentPushToken\[([A-Za-z0-9]{22})\]$"
+	pattern = r"^ExponentPushToken\[([A-Za-z0-9_\-]{22})\]$"
 	if not re.match(pattern, token):
 		logger.debug(f"Invalid token format: {token}")
 		return False