Authentication using the metadata service

package main

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

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

func main() {
  ctx, cancel := context.WithCancel(context.Background())
  defer cancel()
  nativeDriver, err := ydb.Open(ctx,
    os.Getenv("YDB_CONNECTION_STRING"),
    yc.WithCredentials(),
    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) {
    AuthProvider authProvider = CloudAuthHelper.getMetadataAuthProvider();

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

    TableClient tableClient = TableClient.newClient(transport).build();

    doWork(tableClient);

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

import { Driver, MetadataAuthService } from 'ydb-sdk';

export async function connect(endpoint: string, database: string) {
    const authService = new MetadataAuthService();
    const driver = new Driver({endpoint, database, authService});
    const timeout = 10000;
    if (!await driver.ready(timeout)) {
        console.log(`Driver has not become ready in ${timeout}ms!`);
        process.exit(1);
    }
    console.log('Driver connected')
    return driver
}

import os
import ydb
import ydb.iam

with ydb.Driver(
    connection_string=os.environ["YDB_CONNECTION_STRING"],
    credentials=ydb.iam.MetadataUrlCredentials(),
) as driver:
    driver.wait(timeout=5)
    ...

import os
import ydb
import ydb.iam
import asyncio

async def ydb_init():
    async with ydb.aio.Driver(
        endpoint=os.environ["YDB_ENDPOINT"],
        database=os.environ["YDB_DATABASE"],
        credentials=ydb.iam.MetadataUrlCredentials(),
    ) as driver:
        await driver.wait()
        ...

asyncio.run(ydb_init())

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

var metadataProvider = new MetadataProvider();

// Await initial IAM token.
await metadataProvider.Initialize();

var config = new DriverConfig(
    endpoint: endpoint, // Database endpoint, "grpcs://host:port"
    database: database, // Full database path
    credentials: metadataProvider
);

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

<?php

use YdbPlatform\Ydb\Ydb;
use YdbPlatform\Ydb\Auth\Implement\MetadataAuthentication;

$config = [

    // Database path
    'database'    => '/local',

    // Database endpoint
    'endpoint'    => 'localhost:2136',

    // Auto discovery (dedicated server only)
    'discovery'   => false,

    // IAM config
    'iam_config'  => [
        'insecure' => true,
        // 'root_cert_file' => './CA.pem', // Root CA file (uncomment for dedicated server)
    ],

    'credentials' => new MetadataAuthentication()
];

$ydb = new Ydb($config);