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::apphub_v1::AppHubClient(
google::cloud::apphub_v1::MakeAppHubConnection(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 2025-03-05 UTC."],[[["This document lists available versions of the AppHub documentation, ranging from version 2.23.0 to the latest release candidate 2.37.0-rc."],["The client libraries primarily utilize Application Default Credentials for authenticating with Google Cloud Services, but this default can be overridden."],["You can override default authentication by supplying the UnifiedCredentialsOption, and the provided code demonstrates how to load a service account key file explicitly."],["The document recommends reviewing the \"Best practices for managing service account keys\" guide for comprehensive details on service account key management."],["For more details on creating `google::cloud::Credentials` objects, refer to the Authentication Components documentation."]]],[]]
