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"]],[["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 VMware Engine C++ client library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The default authentication method for the client libraries is Application Default Credentials, but there is the option to override this using the `UnifiedCredentialsOption`."],["Users can explicitly load service account key files to override default credentials, as demonstrated in the provided example using the `MakeServiceAccountCredentials` function."],["For detailed information on managing service account keys, refer to the \"Best practices for managing service account keys\" guide, and for creating `google::cloud::Credentials` objects, see the Authentication Components section."],["The provided code snippet demonstrates how to set the authentication credentials using a service account key file and can be used as a reference for how to utilize `google::cloud::UnifiedCredentialsOption` in practice."]]],[]]
