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::privilegedaccessmanager_v1::
PrivilegedAccessManagerClient(
google::cloud::privilegedaccessmanager_v1::
MakePrivilegedAccessManagerConnection(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 2025-03-21 UTC."],[[["This document details how to override the default authentication credentials used by client libraries when interacting with Google Cloud Services."],["The latest version available is 2.37.0-rc, with multiple prior versions also available including 2.36.0 down to 2.27.0."],["The `UnifiedCredentialsOption` can be used to explicitly define credentials, as shown in the example demonstrating how to load a service account key file."],["The document advises consulting the \"Best practices for managing service account keys\" guide for further information on handling credentials."],["For additional details on creating `google::cloud::Credentials` objects, the \"Authentication Components\" documentation is recommended."]]],[]]
