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 page documents different versions of the BareMetalSolution service, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The content provides a way to override the default authentication credentials used by the client libraries, in the event that applications require something other than the Application Default Credentials."],["Overriding credentials can be achieved by using the `UnifiedCredentialsOption` and explicitly loading a service account key file, as shown in the provided example."],["The provided content highlights that, although functional, the provided example on how to override authentication credentials is basic and that the user should consult the \"Best practices for managing service account keys\" guide for better security."],["Users can find additional information about the creation of the `google::cloud::Credentials` objects in the \"Authentication Components\" documentation."]]],[]]
