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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThis document provides a guide on how to override default authentication credentials for Google Cloud services, specifically within the context of the Container Analysis API.\u003c/p\u003e\n"],["\u003cp\u003eThe client libraries typically use Application Default Credentials, but you can override this by providing the \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e, as demonstrated in the example with a service account key file.\u003c/p\u003e\n"],["\u003cp\u003eVersion history for the \u003ccode\u003econtaineranalysis\u003c/code\u003e API are displayed from \u003ccode\u003e2.37.0-rc\u003c/code\u003e to \u003ccode\u003e2.11.0\u003c/code\u003e, with each version linking to the authentication override documentation.\u003c/p\u003e\n"],["\u003cp\u003eExamples are provided for both \u003ccode\u003econtaineranalysis_v1::ContainerAnalysisClient\u003c/code\u003e and \u003ccode\u003econtaineranalysis_v1::GrafeasClient\u003c/code\u003e to further illustrate how to override credentials with a service account key.\u003c/p\u003e\n"],["\u003cp\u003eIt is recommended to consult the provided link to the "Best practices for managing service account keys" guide for further insights on credentials management.\u003c/p\u003e\n"]]],[],null,[]]
