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 page provides documentation for different versions of the TPU client library, ranging from version 2.11.0 to 2.37.0-rc, with 2.37.0-rc being the latest release candidate."],["The documentation focuses on how to override the default authentication mechanism using the `UnifiedCredentialsOption` when interacting with Google Cloud Services, particularly the TPU service."],["It provides an example of overriding authentication by loading a service account key file and setting it as the credentials for the `TpuClient`, demonstrating a method for users to manage their credentials explicitly."],["The page also provides links to examples for `tpu_v1::TpuClient` and `tpu_v2::TpuClient` to showcase the process of using service account authentication."],["Users are encouraged to consult the \"Best practices for managing service account keys\" guide and the \"Authentication Components\" section for more details on credential management."]]],[]]