A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

Showing content from https://cloud.google.com/cpp/docs/reference/bigtable/2.32.0/bigtable-auth-example below:

C++ Client Libraries | Google Cloud

Skip to main content

Stay organized with collections Save and categorize content based on your preferences.

Override the authentication configuration

Some applications cannot use the default authentication mechanism (known as Application Default Credentials). You can override this default using google::cloud::UnifiedCredentialsOption. The following example shows how to explicitly load a service account key file.

  namespace bigtable = ::google::cloud::bigtable;
  [](std::string const& project_id, std::string const& instance_id,
     std::string const& table_id, std::string const& keyfile) {
    auto is = std::ifstream(keyfile);
    is.exceptions(std::ios::badbit);
    auto contents = std::string(std::istreambuf_iterator<char>(is.rdbuf()), {});
    auto options =
        google::cloud::Options{}.set<google::cloud::UnifiedCredentialsOption>(
            google::cloud::MakeServiceAccountCredentials(contents));
    auto resource = bigtable::TableResource(project_id, instance_id, table_id);
    return bigtable::Table(bigtable::MakeDataConnection(options), resource);
  }

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.

Changing the default authentication configuration for other *Client classes is very similar, as shown in these examples:

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.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

[[["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 2025-08-14 UTC."],[[["This page provides documentation and examples for overriding the default authentication mechanism in Google Cloud C++ client libraries, such as when Application Default Credentials are not suitable."],["The latest release candidate (rc) version available is 2.37.0-rc, with additional examples and documentation being provided for versions ranging from 2.20.0 all the way up to this rc."],["The `google::cloud::UnifiedCredentialsOption` class can be utilized to override default authentication, as demonstrated with an example showing how to explicitly load a service account key file."],["This authentication override functionality extends to other client classes like `BigtableTableAdminClient` and `InstanceTableAdminClient`, and relevant snippets for these can be found for version 2.32.0."],["For best practices on managing service account keys and more information on `google::cloud::Credentials` objects, refer to the linked documentation within the content provided."]]],[]]

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4