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::securesourcemanager_v1::SecureSourceManagerClient(
google::cloud::securesourcemanager_v1::
MakeSecureSourceManagerConnection(options));
}
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 webpage provides documentation for different versions of the SecureSourceManager, ranging from version 2.18.0 up to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe content primarily discusses how to override default authentication credentials using the \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e when interacting with Google Cloud Services.\u003c/p\u003e\n"],["\u003cp\u003eThe example code demonstrates how to load service account key files explicitly for authentication, providing a clear guide for overriding default credentials.\u003c/p\u003e\n"],["\u003cp\u003eUsers are directed to the "Best practices for managing service account keys" guide for detailed information on managing service account credentials securely.\u003c/p\u003e\n"],["\u003cp\u003eFor more information on the factory functions to create credential objects, users are directed to the "Authentication Components" documentation.\u003c/p\u003e\n"]]],[],null,[]]
