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::filestore_v1::CloudFilestoreManagerClient(
google::cloud::filestore_v1::MakeCloudFilestoreManagerConnection(
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."],[[["This page provides documentation for overriding default authentication credentials when using Google Cloud client libraries, specifically within the context of Cloud Filestore."],["The latest release candidate version for the provided Cloud Filestore documentation is 2.37.0-rc, with documentation available for various releases from 2.11.0 to the latest."],["The default authentication method is Application Default Credentials, but it can be overridden using the UnifiedCredentialsOption, demonstrated by an example that loads a service account key file."],["Users are directed to use a reference guide on managing service account keys for details, and to another guide for information on creating credential objects."]]],[]]