xxxxxxxxxx
>npm i crypto
>node
>require('crypto').randomBytes(64).toString('hex')
xxxxxxxxxx
node -e "console.log(require('crypto').randomBytes(256).toString('base64'));"
xxxxxxxxxx
node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"
xxxxxxxxxx
node -e "console.log(require('crypto').randomBytes(256).toString('base64'));"