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 2025-03-21 UTC."],[[["The webpage provides documentation for overriding default authentication credentials when interacting with Google Cloud Services, specifically within the context of C++ client libraries."],["The latest version available is 2.37.0-rc, but it also lists versions from 2.11.0 to 2.36.0, allowing access to documentation for a range of previous releases."],["By using `UnifiedCredentialsOption`, users can explicitly provide credentials, such as a service account key file, to override the default Application Default Credentials."],["The documentation recommends reviewing the \"Best practices for managing service account keys\" guide for detailed information and security considerations related to service account key management."],["The `Authentication Components` section is recommended to review for more information on the factory functions to create credentials objects."]]],[]]
