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::baremetalsolution_v2::BareMetalSolutionClient(
google::cloud::baremetalsolution_v2::MakeBareMetalSolutionConnection(
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 documentation for various versions of the BareMetalSolution C++ client library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The primary focus of the content is on how to override the default authentication credentials used by the client libraries, specifically by using the `UnifiedCredentialsOption`."],["Users can override the default authentication by loading a service account key file, and the provided example demonstrates how to do this with a service account key file path."],["It's recommended that users consult the \"Best practices for managing service account keys\" guide for comprehensive information on service account key management."],["Additional details about the creation of `google::cloud::Credentials` objects can be found under the Authentication Components section of the documentation."]]],[]]
