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 content provides documentation for various versions of connectors, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["The default authentication method utilizes Application Default Credentials, but this can be overridden when necessary."],["Authentication credentials can be overridden by using the UnifiedCredentialsOption, allowing for the explicit loading of a service account key file."],["The provided example demonstrates how to load a service account key file to override default credentials, using the `google::cloud::UnifiedCredentialsOption` class."],["The documentation recommends consulting the \"Best practices for managing service account keys\" guide for more information on secure key management."]]],[]]
