Authentication using a service account file

package main

import (
  "context"
  "database/sql"
  "os"

  "github.com/ydb-platform/ydb-go-sdk/v3"
  yc "github.com/ydb-platform/ydb-go-yc"
)

func main() {
  ctx, cancel := context.WithCancel(context.Background())
  defer cancel()
  nativeDriver, err := ydb.Open(ctx,
    os.Getenv("YDB_CONNECTION_STRING"),
    yc.WithServiceAccountKeyFileCredentials(
      os.Getenv("YDB_SERVICE_ACCOUNT_KEY_FILE_CREDENTIALS"),
    ),
    yc.WithInternalCA(), // append Yandex Cloud certificates
  )
  if err != nil {
    panic(err)
  }
  defer nativeDriver.Close(ctx) 
  connector, err := ydb.Connector(nativeDriver)
  if err != nil {
    panic(err)
  }
  db := sql.OpenDB(connector)
  defer db.Close()
  ...
}

public void work(String connectionString, String saKeyPath) {
    AuthProvider authProvider = CloudAuthHelper.getServiceAccountFileAuthProvider(saKeyPath);

    GrpcTransport transport = GrpcTransport.forConnectionString(connectionString)
            .withAuthProvider(authProvider)
            .build());
    
    TableClient tableClient = TableClient.newClient(transport).build();

    doWork(tableClient);

    tableClient.close();
    transport.close();
}

using Ydb.Sdk;
using Ydb.Sdk.Yc;

const string endpoint = "grpc://localhost:2136";
const string database = "/local";

var saProvider = new ServiceAccountProvider(
    saFilePath: "path/to/sa_file.json" // Path to file with service account JSON info);
);
await saProvider.Initialize();

var config = new DriverConfig(
    endpoint: endpoint,
    database: database,
    credentials: saProvider
);

await using var driver = await Driver.CreateInitialized(config);

<?php

use YdbPlatform\Ydb\Ydb;
use YdbPlatform\Ydb\Auth\JwtWithJsonAuthentication;

$config = [
    'database'    => '/ru-central1/b1glxxxxxxxxxxxxxxxx/etn0xxxxxxxxxxxxxxxx',
    'endpoint'    => 'ydb.serverless.yandexcloud.net:2135',
    'discovery'   => false,
    'iam_config'  => [
        'temp_dir'       => './tmp', // Temp directory
        // 'root_cert_file' => './CA.pem', // Root CA file (uncomment for dedicated server)ы
    ],
            
    'credentials' => new JwtWithJsonAuthentication('./jwtjson.json')
];

$ydb = new Ydb($config);

<?php

use YdbPlatform\Ydb\Ydb;
use YdbPlatform\Ydb\Auth\JwtWithPrivateKeyAuthentication;

$config = [
    'database'    => '/ru-central1/b1glxxxxxxxxxxxxxxxx/etn0xxxxxxxxxxxxxxxx',
    'endpoint'    => 'ydb.serverless.yandexcloud.net:2135',
    'discovery'   => false,
    'iam_config'  => [
        'temp_dir'           => './tmp', // Temp directory
        // 'root_cert_file' => './CA.pem', // Root CA file (uncomment for dedicated server)

    ],
    
    'credentials' => new JwtWithPrivateKeyAuthentication(
        "ajexxxxxxxxx","ajeyyyyyyyyy",'./private.key')
        
];

$ydb = new Ydb($config);