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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 comprehensive list of Container Analysis C++ client library versions, ranging from the latest release candidate 2.37.0-rc down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe client libraries typically use Application Default Credentials for authentication with Google Cloud Services, but this can be overridden when needed.\u003c/p\u003e\n"],["\u003cp\u003eYou can override the default authentication by providing the \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e, which allows for the explicit loading of a service account key file, as demonstrated in the provided code example.\u003c/p\u003e\n"],["\u003cp\u003eExamples of how to override authentication for other client classes such as \u003ccode\u003econtaineranalysis_v1::ContainerAnalysisClient\u003c/code\u003e and \u003ccode\u003econtaineranalysis_v1::GrafeasClient\u003c/code\u003e are linked in the documentation.\u003c/p\u003e\n"],["\u003cp\u003eFor more information on creating \u003ccode\u003egoogle::cloud::Credentials\u003c/code\u003e objects, you can consult the Authentication Components section.\u003c/p\u003e\n"]]],[],null,[]]
