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::networksecurity_v1::NetworkSecurityClient(
google::cloud::networksecurity_v1::MakeNetworkSecurityConnection(
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."],[[["This document provides a reference for Network Security authentication overrides, with version details ranging from 2.13.0 to the latest release candidate 2.37.0-rc."],["The default method for authentication with Google Cloud Services is through Application Default Credentials, but it can be overridden if needed."],["You can override the default authentication by using the `UnifiedCredentialsOption`, such as by loading a service account key file, with an example being shown in the content."],["The provided example uses a service account key file to create authentication, but users are encouraged to refer to the \"Best practices for managing service account keys\" guide for more secure implementation."],["More information about the `Credentials` objects and how to create them can be found in the \"Authentication Components\" section."]]],[]]
