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::networkservices_v1::DepServiceClient(
google::cloud::networkservices_v1::MakeDepServiceConnection(options));
}
Follow these links to find examples for other *Client classes:
[[["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 available for network services is 2.37.0-rc, with previous versions listed from 2.36.0 down to 2.12.0."],["By default, client libraries authenticate using Application Default Credentials, but you can override this with `UnifiedCredentialsOption`."],["Overriding default credentials can be done by providing a service account key file, as demonstrated in the example code using `MakeServiceAccountCredentials`."],["Examples are provided for both `networkservices_v1::DepServiceClient` and `networkservices_v1::NetworkServicesClient` to show how to use service account credentials."],["For managing service account keys, refer to the best practices guide, and for more information on creating credentials, check the Authentication Components section."]]],[]]
