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 2025-05-07 UTC."],[[["This page provides documentation for overriding authentication credentials when interacting with Google Cloud Filestore services through the C++ client library, across multiple versions."],["The latest version of the documentation available is 2.37.0-rc, and it includes documentation for various releases back to version 2.11.0, each linked to its corresponding page."],["The C++ client libraries, by default, use Application Default Credentials, but can be overridden by providing a `UnifiedCredentialsOption`, as demonstrated with loading a service account key file."],["The provided code example demonstrates how to explicitly load a service account key file for authentication, and it is recommended to consult best practices for service account key management."],["Additional information on creating `google::cloud::Credentials` objects can be found in the \"Authentication Components\" section."]]],[]]
