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 version available is 2.37.0-rc, with numerous other versions, from 2.36.0 down to 2.11.0, also accessible."],["Client libraries typically use Application Default Credentials for Google Cloud Services authentication, but users can override this default."],["Authentication credentials can be overridden by utilizing the UnifiedCredentialsOption."],["One way to override default credentials is to load a service account key file explicitly, as shown in the provided code example."],["The Authentication Components section provides additional details on creating google::cloud::Credentials objects for users who need to customize authentication further."]]],[]]