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 2025-03-14 UTC."],[[["The latest version of the Telco Automation documentation is 2.37.0-rc, with a range of previous versions available, spanning from 2.36.0 down to 2.19.0."],["Client libraries typically use Application Default Credentials for Google Cloud Services authentication, but this can be overridden if needed."],["You can override the default authentication by using the UnifiedCredentialsOption, such as by explicitly loading a service account key file."],["The provided code example demonstrates overriding authentication by loading a service account key file and creating a TelcoAutomationClient with the custom credentials."],["Refer to the \"Best practices for managing service account keys\" and \"Authentication Components\" documentation for more information on credential management and creation."]]],[]]
