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::servicemanagement_v1::ServiceManagerClient(
google::cloud::servicemanagement_v1::MakeServiceManagerConnection(
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 2025-05-07 UTC."],[[["This page provides access to documentation for various versions of the Service Management API, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The documentation explains how to override the default Application Default Credentials used by the client libraries for authenticating with Google Cloud Services, by using the `UnifiedCredentialsOption`."],["A service account key file can be explicitly loaded to override default credentials, as demonstrated in the provided code example, which utilizes the `MakeServiceAccountCredentials` function."],["The page links to additional resources, including best practices for managing service account keys, and the documentation for Authentication Components."],["The `servicemanagement-override-authentication` functionality is covered in all mentioned versions of the service management api."]]],[]]
