Android : client ID for android google+ sign in

I successfully created the client ID by using the sha1 fingerprint on my eclipse, located at windows->preferences->android->build->SHA1 fingerprint, I used the default debug keystore stored in C:\Users\XXXXX.android\debug.keystore. I also used the proper package name of my application.

but this would only work on my machine, since 1 sha1 fingerprint == 1 machine. So my problem is, how will i get the google+ sign in to work when i deploy my app in the playstore?

thanks! btw i used the Oauth 2.0 and not the public api access.