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::shell_v1::CloudShellServiceClient(
google::cloud::shell_v1::MakeCloudShellServiceConnection(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 provides documentation for various versions of the Cloud Shell service, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["By default, the client libraries utilize Application Default Credentials for Google Cloud Services authentication, but this can be overridden."],["To override the default authentication, you can supply the UnifiedCredentialsOption, allowing the use of a service account key file."],["An example is provided showcasing how to load a service account key file to explicitly override the authentication credentials for the Cloud Shell Service."],["For comprehensive details on managing service account keys and creating Credentials objects, refer to the \"Best practices for managing service account keys\" and \"Authentication Components\" documentation, respectively."]]],[]]
