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::talent_v4::CompanyServiceClient(
google::cloud::talent_v4::MakeCompanyServiceConnection(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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe latest version available is 2.37.0-rc, with numerous previous versions from 2.36.0 down to 2.11.0 also available for reference.\u003c/p\u003e\n"],["\u003cp\u003eClient libraries typically use Application Default Credentials for Google Cloud Services, but you can override this by using the UnifiedCredentialsOption.\u003c/p\u003e\n"],["\u003cp\u003eTo override authentication, you can load a service account key file by utilizing the \u003ccode\u003egoogle::cloud::UnifiedCredentialsOption\u003c/code\u003e with the \u003ccode\u003eMakeServiceAccountCredentials\u003c/code\u003e function.\u003c/p\u003e\n"],["\u003cp\u003eExamples are provided for several \u003ccode\u003e*Client\u003c/code\u003e classes including \u003ccode\u003etalent_v4::CompanyServiceClient\u003c/code\u003e, \u003ccode\u003etalent_v4::CompletionClient\u003c/code\u003e, \u003ccode\u003etalent_v4::EventServiceClient\u003c/code\u003e, \u003ccode\u003etalent_v4::JobServiceClient\u003c/code\u003e, and \u003ccode\u003etalent_v4::TenantServiceClient\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eFor further details on creating \u003ccode\u003egoogle::cloud::Credentials\u003c/code\u003e objects, you can refer to the Authentication Components documentation, and service account key management best practices.\u003c/p\u003e\n"]]],[],null,[]]
