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 document provides a reference for the C++ client library's file store authentication, spanning versions from 2.11.0 to the latest release candidate 2.37.0-rc."],["The default authentication method for the client libraries is Application Default Credentials, but they can be overridden when necessary."],["Authentication can be overridden by using the `UnifiedCredentialsOption` to supply alternative credentials, such as loading a service account key file as demonstrated."],["For enhanced security, the document directs users to consult the \"Best practices for managing service account keys\" guide."],["Additional information on the creation of `google::cloud::Credentials` objects can be found within the Authentication Components guide, linked in the 'See Also' section."]]],[]]