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::connectors_v1::ConnectorsClient(
google::cloud::connectors_v1::MakeConnectorsConnection(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 available is 2.37.0-rc, which can be found in the provided list of versions along with other versions ranging from 2.36.0 down to 2.11.0."],["The default authentication method used by client libraries is Application Default Credentials, however this default can be overridden when needed."],["Authentication credentials can be overridden by providing the UnifiedCredentialsOption, which may require loading a service account key file, as demonstrated in the provided example code."],["For detailed information regarding creating `google::cloud::Credentials` objects, refer to the Authentication Components section."],["For best practices on how to manage service account keys, you should refer to the dedicated guide provided by google."]]],[]]