The City of Yonkers Subpoenas Google

[Rich Younglord]

I have been putting up bandit signs in Yonkers, NY with my google voice number on it. I just received an email from google stating that Yonkers has sent them a subpoena to get the name of the owner of this number. They are giving me till Feb 28th to provide them with a file-stamped motion to quash the subpoena (or other formal objection filed in court) via email. 

Does anyone know how to squash the subpoena or fight Yonkers?

Thanks in advance for any help