async def METHOD_NAME(self):
    """
    Instantiate an attestation client using client secrets.
    """
    write_banner("create_attestation_client_aad")
    # [START client_create]
    # Create azure-identity class
    from azure.identity.aio import DefaultAzureCredential
    from azure.security.attestation.aio import AttestationClient
    async with DefaultAzureCredential() as credentials, AttestationClient(
        self.aad_url, credentials
    ) as client:
        print("Retrieve OpenID metadata from: ", self.aad_url)
        openid_metadata = await client.get_open_id_metadata()
        print(" Certificate URI: ", openid_metadata["jwks_uri"])
        print(" Issuer: ", openid_metadata["issuer"])
        await client.close()
    # [END client_create]