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::profiler_v2::ProfilerServiceClient(
google::cloud::profiler_v2::MakeProfilerServiceConnection(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 2025-03-14 UTC."],[[["This page provides documentation for overriding authentication credentials when using Google Cloud client libraries, with a focus on the profiler service."],["The latest release candidate for the profiler service is version 2.37.0-rc, while version 2.14.0 is displayed on the page as the default version selected, and various other version are also available."],["Users can override the default Application Default Credentials by using the `UnifiedCredentialsOption` to specify alternative authentication methods, such as loading a service account key file."],["The documentation provides an example demonstrating how to load a service account key file to authenticate, but it also refers to the best practices guide for managing service account keys for more in depth details."],["Additional information on creating `google::cloud::Credentials` objects can be found in the Authentication Components section."]]],[]]
