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::metastore_v1::DataprocMetastoreClient(
google::cloud::metastore_v1::MakeDataprocMetastoreConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["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 2025-03-14 UTC."],[[["This document provides information on how to override the default Application Default Credentials (ADC) when authenticating with Google Cloud Services."],["You can override the default credentials by utilizing the `UnifiedCredentialsOption` and providing specific credentials, such as those from a service account key file."],["The latest version available is `2.37.0-rc`, and the documentation lists multiple past versions down to `2.13.0`."],["Code examples demonstrate how to explicitly load a service account key file to authenticate, and they are provided for the `metastore_v1::DataprocMetastoreClient` and the `metastore_v1::DataprocMetastoreFederationClient` in the document."],["The Best practices for managing service account keys guide is available for further reading on managing service account keys."]]],[]]
