The API returned an error: Invalid Input

[valecss]

Once i runned the code, and i've entered the code console return:

Token stored to ./token.json
The API returned an error: Invalid Input

[mgifford]

I got

$ node .
Error loading client secret file: { [Error: ENOENT: no such file or directory, open 'credentials.json']
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: 'credentials.json' }