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::vmwareengine_v1::VmwareEngineClient(
google::cloud::vmwareengine_v1::MakeVmwareEngineConnection(options));
}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-09 UTC."],[[["This webpage provides documentation for the VMware Engine C++ client library, including a list of available versions ranging from 2.11.0 up to the latest release candidate 2.37.0-rc."],["The content explains how to override the default Application Default Credentials (ADC) for authenticating with Google Cloud Services by using the `UnifiedCredentialsOption`."],["A practical example demonstrates how to load a service account key file explicitly to create authentication credentials, using the `MakeServiceAccountCredentials` function."],["The documentation references the guide for best practices in managing service account keys and further information on authentication components."]]],[]]
