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."],[[["The latest release for Network Security is version 2.37.0-rc, with previous versions listed down to 2.13.0, all of which are accessible."],["Client libraries default to using Application Default Credentials (ADC) for authentication with Google Cloud Services, unless otherwise configured."],["To override default authentication, the UnifiedCredentialsOption can be used, and a service account key file can be explicitly loaded as shown in the example code provided."],["For more in-depth information about managing service account keys, the guide titled \"Best practices for managing service account keys\" should be consulted."],["The Authentication Components link provides more information about the factory functions to create `google::cloud::Credentials` objects."]]],[]]
