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::networkservices_v1::DepServiceClient(
google::cloud::networkservices_v1::MakeDepServiceConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["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."],[[["This page provides documentation for various versions of the Network Services C++ client library, ranging from version 2.12.0 up to the latest release candidate 2.37.0-rc."],["The client libraries primarily use Application Default Credentials for authentication, but this can be overridden using the `UnifiedCredentialsOption`."],["The provided example demonstrates how to explicitly load a service account key file to override the default authentication."],["Specific examples are provided for `networkservices_v1::DepServiceClient` and `networkservices_v1::NetworkServicesClient` classes to show how to authenticate with a service account."],["For more information on creating `google::cloud::Credentials` objects and managing service accounts, the page links to the \"Authentication Components\" guide and \"Best practices for managing service account keys\" guide."]]],[]]
