The answer keytrap gave is a correct one. But since 2017, gcsfuse as well as GCP have evolved and there are some more (maybe easier) options to let gscfuse connect with a Google account:
- If you are running on a Google Compute Engine instance with scope storage-full configured, then Cloud Storage FUSE can use the Compute Engine built-in service account.
- If you installed the Google Cloud SDK and ran gcloud auth application-default login, then Cloud Storage FUSE can use these credentials.
- If you set the environment variable GOOGLE_APPLICATION_CREDENTIALS to the path of a service account's JSON key file, then Cloud Storage FUSE will use this credential.
Source: Cloud Storage FUSE
