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::assuredworkloads_v1::AssuredWorkloadsServiceClient(
google::cloud::assuredworkloads_v1::
MakeAssuredWorkloadsServiceConnection(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 webpage provides a list of Assured Workloads C++ client library versions, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, each linking to their respective documentation pages."],["The primary content explains how to override the default authentication credentials used by the C++ client libraries for Google Cloud Services, typically using Application Default Credentials."],["Overriding the default authentication involves using the `UnifiedCredentialsOption` and can be achieved by explicitly loading a service account key file, as demonstrated in the provided code example."],["The best practices for managing service account keys should be consulted for more details, as the example used is simplified for clarity."],["The `Authentication Components` section provides additional information on creating `google::cloud::Credentials` objects."]]],[]]
