embulk-output-bigquery | Embulk output plugin to load/insert data | Dashboard library

As the documentation [1], if we have 401- Unauthorized error then there could be many reasons, please have a related list of reasons listed below [followed the link 1], which could be helpful for troubleshooting:

Reason:AuthenticationRequiredRequesterPays

Access to a Requester Pays bucket requires authentication.

Reason: authError

This error indicates a problem with the authorization provided in the request to Cloud Storage. The following are some situations where that will occur: The OAuth access token has expired and needs to be refreshed. This can be avoided by refreshing the access token early, but code can also catch this error, refresh the token and retry automatically. Multiple non-matching authorizations were provided; choose one mode only. The OAuth access token's bound project does not match the project associated with the provided developer key. The Authorization header was of an unrecognized format or uses an unsupported credential type.

reason:lockedDomainExpired

When downloading content from a cookie-authenticated site, e.g., using the Storage Browser, the response will redirect to a temporary domain. This error will occur if access to said domain occurs after the domain expires. Issue the original request again, and receive a new redirect.

Reason: push.webhookUrlUnauthorized

Requests to storage.objects.watchAll will fail unless you verify you own the domain.

Reason: required

Access to a non-public method that requires authorization was made, but none was provided in the Authorization header or through other means.

[1] https://cloud.google.com/storage/docs/json_api/v1/status-codes#401_Unauthorized