Unsuccessful tznft invocation exits with 0 return code

[itkach]

❯ tznft mint alice --tokens '0,T1,Igors Mega Token' '1, T2, Another One Bites The Dust'
no tznft.json config file found
Try to run tznft config-int command to create default config
unknown error:
Error: no tznft.json config file found
    at Object.loadUserConfig (/Users/itkach/dev/nft-tutorial/lib/config-util.js:61:15)
    at Object.<anonymous> (/Users/itkach/dev/nft-tutorial/lib/contracts.js:75:38)
    at Generator.next (<anonymous>)
    at /Users/itkach/dev/nft-tutorial/lib/contracts.js:27:71
    at new Promise (<anonymous>)
    at __awaiter (/Users/itkach/dev/nft-tutorial/lib/contracts.js:23:12)
    at Object.mintNfts (/Users/itkach/dev/nft-tutorial/lib/contracts.js:72:12)
    at /Users/itkach/dev/nft-tutorial/lib/tznft.js:113:99
    at Generator.next (<anonymous>)
    at /Users/itkach/dev/nft-tutorial/lib/tznft.js:28:71

~
❯ echo $?
0

Expected result: non-zero return code