Raise an error only if required is True and token is not present

gluon/tools.py

@@ -1335,7 +1335,7 @@ class AuthJWT(object):
                     if required:
                         raise e
                     token = None
-                if not token:
+                if not token and required:
                     raise HTTP(400, 'Invalid token')
                 if token and len(token) < self.max_header_length:
                     old_verify_expiration = self.verify_expiration