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::securesourcemanager_v1::SecureSourceManagerClient(
google::cloud::securesourcemanager_v1::
MakeSecureSourceManagerConnection(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 content provides a list of documentation versions for SecureSourceManager, ranging from version 2.37.0-rc (latest) down to 2.18.0."],["The primary topic of the documentation is how to override the default authentication credentials for Google Cloud Services using the `UnifiedCredentialsOption`."],["The example demonstrates how to load a service account key file explicitly to override the default Application Default Credentials."],["For detailed instructions and security best practices about service account keys, refer to the \"Best practices for managing service account keys\" guide."],["For more information on creating `google::cloud::Credentials` objects, refer to the \"Authentication Components\" documentation."]]],[]]
