How to fix run-time permission pop-up on Android Marshmallow

Hey unity buddies, right now i have built my game and when i have installed on Android 6.x it needed READ_PHONE_STATE and some other permission and If I denied these permissions at run-time app gets crashed, please tell me the right solution, How to remove these pop-up asking after first time installation.
Any type of help will be appreciable .
Thanks
Sumit

Add the following to your manifest file:

 <meta-data android:name="unityplayer.SkipPermissionsDialog" android:value="true" />