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::notebooks_v1::ManagedNotebookServiceClient(
google::cloud::notebooks_v1::MakeManagedNotebookServiceConnection(
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 2025-03-05 UTC."],[[["This page provides documentation for overriding default authentication credentials when using Google Cloud client libraries, with the latest version being 2.37.0-rc."],["The client libraries primarily use Application Default Credentials for Google Cloud service authentication, but users can override this by providing a `UnifiedCredentialsOption`."],["The example code shows how to load a service account key file and apply it as credentials, allowing you to connect to various services using these loaded credentials."],["The documentation includes examples for `notebooks_v1::ManagedNotebookServiceClient` and `notebooks_v1::NotebookServiceClient` on how to override the default credentials, using version 2.14.0 as a base."],["There is also a link to the \"Best practices for managing service account keys\" guide for more information, along with one to the \"Authentication Components\" section in the documentation."]]],[]]