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::privilegedaccessmanager_v1::
PrivilegedAccessManagerClient(
google::cloud::privilegedaccessmanager_v1::
MakePrivilegedAccessManagerConnection(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."],[[["The webpage details how to override the default authentication credentials used by client libraries when interacting with Google Cloud Services."],["By default, the client libraries utilize Application Default Credentials (ADC) for authentication, but this can be overridden in specific scenarios."],["Overriding the default authentication involves providing a `UnifiedCredentialsOption`, such as explicitly loading a service account key file."],["The provided code example demonstrates how to load a service account key file to override the default authentication settings."],["For detailed guidance on managing service account keys and using authentication factory functions, users are directed to the Best practices for managing service account keys and the Authentication Components documentation."]]],[]]
