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::containeranalysis_v1::ContainerAnalysisClient(
google::cloud::containeranalysis_v1::MakeContainerAnalysisConnection(
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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 other versions from 2.36.0 down to 2.11.0 also provided, all related to the container analysis override authentication.\u003c/p\u003e\n"],["\u003cp\u003eThe client libraries by default use Application Default Credentials for authentication with Google Cloud Services, but you can override this by using the UnifiedCredentialsOption.\u003c/p\u003e\n"],["\u003cp\u003eYou can override the default authentication by loading a service account key file explicitly as demonstrated in the code example using the \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eExamples for \u003ccode\u003eContainerAnalysisClient\u003c/code\u003e and \u003ccode\u003eGrafeasClient\u003c/code\u003e classes are provided, demonstrating the override authentication for these specific classes.\u003c/p\u003e\n"],["\u003cp\u003eFor best practices regarding managing service account keys and further details on authentication components, refer to the linked guides and documentation provided.\u003c/p\u003e\n"]]],[],null,[]]
