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::accessapproval_v1::AccessApprovalClient(
google::cloud::accessapproval_v1::MakeAccessApprovalConnection(
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."],[[["This webpage documents the different versions of the Access Approval client library, with the latest version being 2.37.0-rc, and contains a comprehensive list of all versions down to 2.11.0."],["The client libraries typically use Application Default Credentials for authentication, but you can override this by utilizing the `UnifiedCredentialsOption`."],["To override default credentials, you can provide a service account key file using the `UnifiedCredentialsOption` and `MakeServiceAccountCredentials` function, as shown in the example."],["It's important to refer to the \"Best practices for managing service account keys\" guide for details on managing service account keys effectively."],["The Authentication Components page offers additional details on creating `google::cloud::Credentials` objects through factory functions."]]],[]]
