Struct Builder

pub struct Builder { /* private fields */ }

Creates Credentials instances backed by the Metadata Service.

While the Google Cloud client libraries for Rust default to credentials backed by the metadata service, some applications may need to:

• Customize the metadata service credentials in some way
• Bypass the Application Default Credentials lookup and only use the metadata server credentials
• Use the credentials directly outside the client libraries

Implementations

impl Builder

pub fn with_endpoint<S: Into<String>>(self, endpoint: S) -> Self

Sets the endpoint for this credentials.

A trailing slash is significant, so specify the base URL without a trailing
slash. If not set, the credentials use http://metadata.google.internal.

Example

let credentials = Builder::default()
    .with_endpoint("https://metadata.google.foobar")
    .build();

pub fn with_quota_project_id<S: Into<String>>(self, quota_project_id: S) -> Self

Set the quota project for this credentials.

In some services, you can use a service account in one project for authentication and authorization, and charge the usage to a different project. This may require that the service account has serviceusage.services.use permissions on the quota project.

pub fn with_universe_domain<S: Into<String>>(self, universe_domain: S) -> Self

Sets the universe domain for this credentials.

Client libraries use universe_domain to determine the API endpoints to use for making requests. If not set, then credentials use ${service}.googleapis.com, otherwise they use `${service}.${universe_domain}.

pub fn with_scopes<I, S>(self, scopes: I) -> Self

where I: IntoIterator<Item = S>, S: Into<String>,

Sets the scopes for this credentials.

Metadata server issues tokens based on the requested scopes. If no scopes are specified, the credentials defaults to all scopes configured for the default service account on the instance.

pub fn build(self) -> Result<Credentials, CredentialsError>

Returns a Credentials instance with the configured settings.

Trait Implementations

impl Debug for Builder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Builder

fn default() -> Builder

Returns the “default value” for a type.