File containing the admin password hash
Generate with
SALT=$(openssl rand -hex 32)
HASH64=$(openssl kdf \
-kdfopt pass:"YOUR-PASSWORD" \
-kdfopt hexsalt:$SALT \
-keylen 64 -kdfopt n:16384 -kdfopt r:8 -kdfopt p:1 \
-binary SCRYPT | base64)
SALT64=$(echo $SALT | xxd -r -p | base64)
echo "\$scrypt\$N=16384,r=8,p=1\$$SALT64\$$HASH64"