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::backupdr_v1::BackupDRClient(
google::cloud::backupdr_v1::MakeBackupDRConnection(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 2025-03-05 UTC."],[[["The webpage provides documentation for overriding default authentication credentials when interacting with Google Cloud Services, particularly in the context of BackupDR."],["It lists various versions of the documentation, ranging from 2.23.0 to 2.37.0-rc, with 2.37.0-rc being the latest version available."],["The primary method for overriding credentials is by using the `UnifiedCredentialsOption`, demonstrated by loading a service account key file."],["The provided code example shows how to load credentials from a service account key file, which can be utilized to override the application default credentials."],["The documentation offers a link to the best practices guide for managing service account keys, alongside another link containing information for factory functions to create `google::cloud::Credentials` objects."]]],[]]
