feat: handle case of token not having a exp time

The token will be cleared, and the expiry time will be
set to 1 second. Then another authentication attempt
will be made.

src/agent/communicator/src/communicator.cpp

@@ -58,6 +58,8 @@ namespace communicator
         else
         {
             std::cerr << "Token does not contain an 'exp' claim" << std::endl;
+            m_token.clear();
+            m_tokenExpTimeInSeconds = 1;
             return boost::beast::http::status::unauthorized;
         }