> ## Documentation Index
> Fetch the complete documentation index at: https://algolia.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Retrieve an authentication resource

> Retrieves an authentication resource by its ID.

**Required ACL:** `addObject`, `deleteIndex`, `editSettings`

## Usage

<CodeGroup>
  ```cs C# theme={"system"}
  // Initialize the client
  var client = new IngestionClient(
    new IngestionConfig("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION")
  );

  // Call the API
  var response = await client.GetAuthenticationAsync("6c02aeb1-775e-418e-870b-1faccd4b2c0f");

  // print the response
  Console.WriteLine(response);
  ```

  ```dart Dart theme={"system"}
  // Initialize the client
  final client = IngestionClient(
      appId: 'ALGOLIA_APPLICATION_ID',
      apiKey: 'ALGOLIA_API_KEY',
      region: 'ALGOLIA_APPLICATION_REGION');

  // Call the API
  final response = await client.getAuthentication(
    authenticationID: "6c02aeb1-775e-418e-870b-1faccd4b2c0f",
  );

  // print the response
  print(response);
  ```

  ```go Go theme={"system"}
  // Initialize the client with your application region, eg. ingestion.ALGOLIA_APPLICATION_REGION
  client, err := ingestion.NewClient("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", ingestion.US)
  if err != nil {
    // The client can fail to initialize if you pass an invalid parameter.
    panic(err)
  }

  // Call the API
  response, err := client.GetAuthentication(client.NewApiGetAuthenticationRequest(
    "6c02aeb1-775e-418e-870b-1faccd4b2c0f"))
  if err != nil {
    // handle the eventual error
    panic(err)
  }


  // print the response
  print(response)
  ```

  ```java Java theme={"system"}
  // Initialize the client
  IngestionClient client = new IngestionClient("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION");

  // Call the API
  Authentication response = client.getAuthentication("6c02aeb1-775e-418e-870b-1faccd4b2c0f");

  // print the response
  System.out.println(response);
  ```

  ```js JavaScript theme={"system"}
  // Initialize the client
  // Replace 'us' with your Algolia Application Region
  const client = algoliasearch('ALGOLIA_APPLICATION_ID', 'ALGOLIA_API_KEY').initIngestion({ region: 'us' });

  // Call the API
  const response = await client.getAuthentication({ authenticationID: '6c02aeb1-775e-418e-870b-1faccd4b2c0f' });


  // print the response
  console.log(response);
  ```

  ```kotlin Kotlin theme={"system"}
  // Initialize the client
  val client =
    IngestionClient(
      appId = "ALGOLIA_APPLICATION_ID",
      apiKey = "ALGOLIA_API_KEY",
      region = "ALGOLIA_APPLICATION_REGION",
    )

  // Call the API
  var response =
    client.getAuthentication(authenticationID = "6c02aeb1-775e-418e-870b-1faccd4b2c0f")


  // print the response
  println(response)
  ```

  ```php PHP theme={"system"}
  // Initialize the client
  $client = IngestionClient::create('ALGOLIA_APPLICATION_ID', 'ALGOLIA_API_KEY', 'ALGOLIA_APPLICATION_REGION');

  // Call the API
  $response = $client->getAuthentication(
      '6c02aeb1-775e-418e-870b-1faccd4b2c0f',
  );


  // print the response
  var_dump($response);
  ```

  ```python Python theme={"system"}
  # Initialize the client
  # In an asynchronous context, you can use IngestionClient instead, which exposes the exact same methods.
  client = IngestionClientSync(
      "ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION"
  )

  # Call the API
  response = client.get_authentication(
      authentication_id="6c02aeb1-775e-418e-870b-1faccd4b2c0f",
  )


  # print the response
  print(response)
  ```

  ```ruby Ruby theme={"system"}
  # Initialize the client
  client = Algolia::IngestionClient.create("ALGOLIA_APPLICATION_ID", "ALGOLIA_API_KEY", "ALGOLIA_APPLICATION_REGION")

  # Call the API
  response = client.get_authentication("6c02aeb1-775e-418e-870b-1faccd4b2c0f")


  # print the response
  puts(response)
  ```

  ```scala Scala theme={"system"}
  // Initialize the client
  val client = IngestionClient(
    appId = "ALGOLIA_APPLICATION_ID",
    apiKey = "ALGOLIA_API_KEY",
    region = "ALGOLIA_APPLICATION_REGION"
  )

  // Call the API
  val response = Await.result(
    client.getAuthentication(
      authenticationID = "6c02aeb1-775e-418e-870b-1faccd4b2c0f"
    ),
    Duration(100, "sec")
  )

  // print the response
  println(response)
  ```

  ```swift Swift theme={"system"}
  // Initialize the client
  let client = try IngestionClient(appID: "ALGOLIA_APPLICATION_ID", apiKey: "ALGOLIA_API_KEY", region: .us)

  // Call the API
  let response = try await client.getAuthentication(authenticationID: "6c02aeb1-775e-418e-870b-1faccd4b2c0f")

  // print the response
  print(response)
  ```
</CodeGroup>

<Card icon="folder-code" horizontal="true" title="See the full API reference" arrow="true" href="/doc/rest-api/ingestion/get-authentication">
  For more details about input parameters
  and response fields.
</Card>