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 Filestore C++ client libraries, spanning versions from 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The latest version available is 2.37.0-rc, while version 2.20.0 is highlighted within the version history."],["The default authentication method utilizes Application Default Credentials, but this can be overridden using the `UnifiedCredentialsOption`."],["The example code demonstrates how to explicitly load a service account key file to override default credentials."],["Refer to the \"Best practices for managing service account keys\" and \"Authentication Components\" guides for additional details on handling service account keys and creating `google::cloud::Credentials` objects, respectively."]]],[]]