How to use the azure-keyvault.azure.keyvault.secrets._client.SecretClient function in azure-keyvault

def __init__(self, vault_url, credentials, config=None, **kwargs):
        self._secrets = SecretClient(vault_url, credentials, config=config, **kwargs)
        self._keys = KeyClient(vault_url, credentials, config=config, **kwargs)

def __init__(self, vault_url, credentials, config=None, **kwargs):
        if not credentials:
            raise ValueError('credentials')

        if not vault_url:
            raise ValueError('vault_url')

        self._vault_url = vault_url
        config = config or SecretClient.create_config(**kwargs)
        transport = RequestsTransport(config.connection)
        policies = [
            config.user_agent,
            config.headers,
            _BearerTokenCredentialPolicy(credentials),
            config.redirect,
            config.retry,
            config.logging,
        ]
        self._pipeline = Pipeline(transport, policies=policies)