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."],[[["The latest release candidate version for the filestore override authentication documentation is 2.37.0-rc, with a range of versions available from 2.36.0 down to 2.11.0."],["By default, client libraries use Application Default Credentials for Google Cloud Services, but these defaults can be overridden if needed."],["Authentication can be customized using the UnifiedCredentialsOption, such as by loading a service account key file as demonstrated in the provided code example."],["The provided code example demonstrates overriding authentication with a service account key file, but users should refer to the best practices guide for managing service account keys for more information."],["More information about the `google::cloud::Credentials` objects and creating them can be found in the Authentication Components section."]]],[]]