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.

WithGRPCConnectionPool returns a ClientOption that creates a pool of gRPC connections that requests will be balanced between.

WithGRPCDialOption returns a ClientOption that appends a new grpc.DialOption to an underlying gRPC dial.

WithHTTPClient returns a ClientOption that specifies the HTTP client to use as the basis of communications.

WithoutAuthentication returns a ClientOption that specifies that no authentication should be used.

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.

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.

A ClientOption is an option for a Google API client.