Package option contains options for Google API clients.
A ClientOption is an option for a Google API client.
WithAPIKey returns a ClientOption that specifies an API key to be used as the basis for authentication.
WithCredentialsFile returns a ClientOption that authenticates API calls with the given service account or refresh token JSON credentials file.
WithEndpoint returns a ClientOption that overrides the default endpoint to be used for a service.
WithGRPCConn returns a ClientOption that specifies the gRPC client connection to use as the basis of communications. This option many only be used with services that support gRPC as their communication transport. When used, the WithGRPCConn option takes precedent over all other supplied options.
WithGRPCConnectionPool returns a ClientOption that creates a pool of gRPC connections that requests will be balanced between. This is an EXPERIMENTAL API and may be changed or removed in the future.
WithGRPCDialOption returns a ClientOption that appends a new grpc.DialOption to an underlying gRPC dial. It does not work with WithGRPCConn.
WithHTTPClient returns a ClientOption that specifies the HTTP client to use as the basis of communications. This option may only be used with services that support HTTP as their communication transport. When used, the WithHTTPClient option takes precedent over all other supplied options.
WithScopes returns a ClientOption that overrides the default OAuth2 scopes to be used for a service.
WithServiceAccountFile returns a ClientOption that uses a Google service account credentials file to authenticate.
Deprecated: Use WithCredentialsFile instead.
WithTokenSource returns a ClientOption that specifies an OAuth2 token source to be used as the basis for authentication.
WithUserAgent returns a ClientOption that sets the User-Agent.
WithoutAuthentication returns a ClientOption that specifies that no authentication should be used. It is suitable only for testing and for accessing public resources, like public Google Cloud Storage buckets. It is an error to provide both WithoutAuthentication and any of WithAPIKey, WithTokenSource, WithCredentialsFile or WithServiceAccountFile.