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::telcoautomation_v1::TelcoAutomationClient(
google::cloud::telcoautomation_v1::MakeTelcoAutomationConnection(
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 2025-04-22 UTC."],[[["The documentation provides a list of Telco Automation client library versions, ranging from the latest release candidate (2.37.0-rc) down to version 2.19.0."],["The client libraries typically use Application Default Credentials for authentication with Google Cloud Services, but they can be overridden."],["Authentication credentials can be overridden by utilizing the `UnifiedCredentialsOption` to explicitly load a service account key file."],["The example shows how to load a service account key file using `MakeServiceAccountCredentials`, which is simple to comprehend but may not represent the best practice."],["For more details on managing service account keys and creating `Credentials` objects, refer to the linked documentation about service account key best practices and authentication components."]]],[]]
