This One Is for CM-13.0 Users who has just updated ROM to latest build and having Issue with Google account  and play service got lost.

Steps to follow

1. On your phone open browser and search for google play service apk
2. Chose the link with 8.3.0.x.x download the apk don't click on install from google Play. Here is link  if you don't love to search.
3. Install it after download finishes. ( you may need to enable install from unknown source in setting)
4. After installation you may got stop error from google play service or any other google app.
5. Just reboot your Phone.
6. After reboot you will get notice to update google play service just do update.
7. It will ask to enter your google account please do give it. Once update is finish.
8. Your Phone is Back to normal.
9. Now enjoy updated ROM with android 6.0.