How to Override the Authentication Credentials
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::dialogflow_es::AgentsClient(
google::cloud::dialogflow_es::MakeAgentsConnection(options));
}
Follow these links to find examples for other *Client
classes:
dialogflow_es::AgentsClient
dialogflow_es::AnswerRecordsClient
dialogflow_es::ContextsClient
dialogflow_es::ConversationDatasetsClient
dialogflow_es::ConversationModelsClient
dialogflow_es::ConversationProfilesClient
dialogflow_es::ConversationsClient
dialogflow_es::DocumentsClient
dialogflow_es::EntityTypesClient
dialogflow_es::EnvironmentsClient
dialogflow_es::FulfillmentsClient
dialogflow_es::IntentsClient
dialogflow_es::KnowledgeBasesClient
dialogflow_es::ParticipantsClient
dialogflow_es::SessionEntityTypesClient
dialogflow_es::SessionsClient
dialogflow_es::VersionsClient
Keep in mind that we chose this as an example because it is relatively easy to understand. Consult the Best practices for managing service account keys guide for more details.
See Also
Authentication Components - for more information on the factory functions to create google::cloud::Credentials
objects.