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 2025-03-21 UTC."],[[["The latest version available is 2.37.0-rc, with various older versions listed down to 2.11.0 for reference."],["By default, client libraries utilize Application Default Credentials for authentication with Google Cloud Services, but this can be overridden."],["You can override default credentials using the UnifiedCredentialsOption, such as explicitly loading a service account key file, as demonstrated in the provided example code."],["For more information on creating Credentials objects, you can refer to the Authentication Components documentation."],["It's important to consult the guide on best practices for managing service account keys to ensure secure usage."]]],[]]
