Done it...... Unencrypt phone (turn passwords off and fingerprint) install twrp for your device (Google instructions very simple) once installed boot to new recovery (you have root in recovery) go to advanced, file manager, then browse to the databases and copy all 3 origin files to /root/sdcard
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boot phone back to system install the first database editor you see on the play store, direct it to the copied origin files... Once database open look for DEVICE click it scroll on a bit and you'll see AUTHKEY that is what you want for gb
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