AWS OpenSearch支持OpenID Connect（OIDC）作为身份验证方法，使用户可以使用他们在OIDC提供者上拥有的凭据来访问OpenSearch集群。以下是使用OIDC进行身份验证的示例代码：

import boto3
from botocore.config import Config

config = Config(
    region_name='us-west-2'
)

sts_client = boto3.client('sts', config=config)

assumed_role_object=sts_client.assume_role(
    RoleArn="arn:aws:iam::accountId:role/testRole",
    RoleSessionName="AssumeRoleSession1"
)

credentials=assumed_role_object['Credentials']

client = boto3.client('opensearch', config=config,
    aws_access_key_id=credentials['AccessKeyId'],
    aws_secret_access_key=credentials['SecretAccessKey'],
    aws_session_token=credentials['SessionToken']
)

es_domain = "es-domain-endpoint"
oidc_client_id = "oidc-client-id"
oidc_client_secret = "oidc-client-secret"
oidc_issuer_url = "https://oidc-issuer-url.com"
oidc_username_claim = "sub"

response = client.create_elasticsearch_domain(
    DomainName=es_domain,
    ElasticsearchVersion='7.10',
    ElasticsearchClusterConfig={
        'InstanceType': 'r5.large.elasticsearch',
        'InstanceCount': 1,
        'DedicatedMasterEnabled': False,
        'ZoneAwarenessEnabled': False,
        'ZoneAwarenessConfig': {
            'AvailabilityZoneCount': 1
        }
    },
    AccessPolicies={
        "Version": "2012-10-17",
        "Statement": [
            {
                "Effect": "Allow",
                "Principal": {
                    "Federated": f"arn:aws:iam::{credentials['AwsAccountId']:d}:oidc-provider/{oidc_issuer_url}"
                },
                "Action": "es:*",
                "Resource": f"arn:aws:es:{config.region_name}:{credentials['AwsAccountId']:d}:domain/{es_domain}/*",
                "Condition": {
                    "StringEquals": {