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::accessapproval_v1::AccessApprovalClient(
google::cloud::accessapproval_v1::MakeAccessApprovalConnection(
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."],[[["The webpage provides documentation for various versions of the Access Approval C++ client library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The latest stable version available is 2.36.0, with several other stable versions available for review, all the way to 2.11.0."],["The content explains how to override default authentication credentials using `UnifiedCredentialsOption`, which is particularly useful when needing to specify a service account key file."],["It is recommended that users familiarize themselves with the best practices for managing service account keys, as referenced in the provided guide."],["The \"Authentication Components\" link offers more details on creating `google::cloud::Credentials` objects."]]],[]]