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::dataplex_v1::ContentServiceClient(
google::cloud::dataplex_v1::MakeContentServiceConnection(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 2025-04-09 UTC."],[[["The latest version available is 2.37.0-rc, with numerous other versions from 2.36.0 down to 2.11.0 also provided."],["Client libraries primarily use Application Default Credentials for authentication with Google Cloud Services, but these can be overridden."],["Overriding the default credentials can be achieved by providing the `UnifiedCredentialsOption`, such as by loading a service account key file, to allow for more control."],["Examples for overriding credentials are provided for `ContentServiceClient`, `DataplexServiceClient`, and `MetadataServiceClient` classes."],["For best practices regarding service account keys, it is advised to refer to the \"Best practices for managing service account keys\" guide."]]],[]]
