This is step by step instruction to get SHA1 key.
1. Make sure that you installed JDK(Java Development Kit). If you have not installed yet, you can download it here and install it.
2. Open command line: Win+R->type “cmd”->click OK button. Navigate to JDK bin folder. In my case it is on “C:\Program Files\Java\jdk1.8.0_91\bin”. May have installed in another place or have another version. Navigate to bin folder – type on command line:
3. After navigating, type this to create SHA1 key:
4. Now you can see SHA1 key! Good luck