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::alloydb_v1::AlloyDBAdminClient(
google::cloud::alloydb_v1::MakeAlloyDBAdminConnection(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."],[[["This webpage provides documentation for various versions of the AlloyDB C++ client library, ranging from version 2.11.0 up to the latest release candidate, 2.37.0-rc."],["The default authentication method for the client libraries is Application Default Credentials, but users can override this setting."],["Users can override the default authentication by utilizing the `UnifiedCredentialsOption` and providing alternative credentials, such as loading a service account key file, as shown in the example."],["It is recommended that users consult the \"Best practices for managing service account keys\" guide for managing service account keys securely."],["Additional information on creating `google::cloud::Credentials` objects can be found in the Authentication Components documentation."]]],[]]
