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::apigeeconnect_v1::ConnectionServiceClient(
google::cloud::apigeeconnect_v1::MakeConnectionServiceConnection(
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 2025-04-17 UTC."],[[["This document outlines the different versions of the Apigee Connect authentication override, ranging from the latest release candidate, 2.37.0-rc, down to version 2.11.0."],["The default authentication for client libraries uses Application Default Credentials, which can be overridden when needed."],["You can override the default authentication by using the `UnifiedCredentialsOption`, such as explicitly loading a service account key file, shown in the given code snippet."],["The provided code example demonstrates loading a service account key file for authentication override using `google::cloud::UnifiedCredentialsOption` and `google::cloud::MakeServiceAccountCredentials`."],["Refer to the \"Best practices for managing service account keys\" guide and the \"Authentication Components\" documentation for more details on service account key management and credential factory functions."]]],[]]
