Unless otherwise configured, the client libraries use Application Default Credentials to authenticate with Google Cloud Services. While this works for most applications, in some cases you may need to override this default. You can do so by providing the UnifiedCredentialsOption The following example shows how to explicitly load a service account key file:
[](std::string const& keyfile) {
auto is = std::ifstream(keyfile);
is.exceptions(std::ios::badbit); // Minimal error handling in examples
auto contents = std::string(std::istreambuf_iterator<char>(is.rdbuf()), {});
auto options =
google::cloud::Options{}.set<google::cloud::UnifiedCredentialsOption>(
google::cloud::MakeServiceAccountCredentials(contents));
return google::cloud::tpu_v1::TpuClient(
google::cloud::tpu_v1::MakeTpuConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["This document provides versioned documentation for the C++ TPU client library, with the latest release candidate being version 2.37.0-rc."],["The client libraries, by default, utilize Application Default Credentials for authentication with Google Cloud Services, but this can be overridden."],["You can override default authentication by providing a `UnifiedCredentialsOption`, such as by loading a service account key file as demonstrated in the example."],["Examples for how to use service accounts are available for both `tpu_v1::TpuClient` and `tpu_v2::TpuClient` classes."],["The document also recommends consulting the \"Best practices for managing service account keys\" guide."]]],[]]
