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::edgecontainer_v1::EdgeContainerClient(
google::cloud::edgecontainer_v1::MakeEdgeContainerConnection(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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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 primarily provides documentation for various versions of the \u003ccode\u003eedgecontainer\u003c/code\u003e C++ client library, ranging from version 2.11.0 up to 2.37.0-rc, with version 2.37.0-rc being the latest release candidate.\u003c/p\u003e\n"],["\u003cp\u003eThe default authentication method for the C++ client libraries utilizes Application Default Credentials, however users have the option to override this setting.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication override can be performed by providing a \u003ccode\u003eUnifiedCredentialsOption\u003c/code\u003e, and the example provided shows how to explicitly load a service account key file.\u003c/p\u003e\n"],["\u003cp\u003eFor more information on how to create \u003ccode\u003eCredentials\u003c/code\u003e objects, users can refer to the "Authentication Components" section in the documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe user should also reference the "Best practices for managing service account keys" for more details.\u003c/p\u003e\n"]]],[],null,[]]
