tests/test-conf/cpp_credentials_file.json

{
  "client_id":"Xd23RHsUnvUlP7wchjNYOaIfazgeHd9x",
  "client_secret":"rT7ps7WY8uhdVuBTKWZkttwLdQotmdEliaM5rLfmgNibvqziZ-g07ZH52N_poGAb"
}