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::edgenetwork_v1::EdgeNetworkClient(
google::cloud::edgenetwork_v1::MakeEdgeNetworkConnection(options));
}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["The latest release candidate version is 2.37.0-rc, and a list of other available versions are shown, ranging down to version 2.19.0."],["Client libraries use Application Default Credentials for authentication with Google Cloud Services unless configured otherwise."],["You can override the default authentication by using `UnifiedCredentialsOption`, such as loading a service account key file."],["The provided example demonstrates loading a service account key file, which is a relatively simple method of overriding authentication."],["Refer to the \"Best practices for managing service account keys\" guide and \"Authentication Components\" for further details and alternative methods."]]],[]]
