How to use the awscrt.isinstance_str function in awscrt

def new_static(cls, access_key_id, secret_access_key, session_token=None):
        """
        Create a simple provider that just returns a fixed set of credentials
        """
        assert isinstance_str(access_key_id)
        assert isinstance_str(secret_access_key)
        assert isinstance_str(session_token) or session_token is None

        binding = _awscrt.credentials_provider_new_static(access_key_id, secret_access_key, session_token)
        return cls(binding)

def override_default_trust_store_from_path(self, ca_dirpath, ca_filepath):

        assert isinstance_str(ca_dirpath) or ca_dirpath is None
        assert isinstance_str(ca_filepath) or ca_filepath is None

        if ca_filepath:
            ca_buffer = _read_binary_file(ca_filepath)
            self.override_default_trust_store(ca_buffer)

        self.ca_dirpath = ca_dirpath

algorithm,  # type: AwsSigningAlgorithm
                 credentials_provider,  # type: AwsCredentialsProviderBase
                 region,  # type: str
                 service,  # type: str
                 date=None,  # type: Optional[datetime.datetime]
                 should_sign_param=None,  # type: Optional[Callable[[str], bool]]
                 use_double_uri_encode=False,  # type: bool
                 should_normalize_uri_path=True,  # type: bool
                 body_signing_type=AwsBodySigningConfigType.BodySigningOn  # type: AwsBodySigningConfigType
                 ):
        # type: (...) -> None

        assert isinstance(algorithm, AwsSigningAlgorithm)
        assert isinstance(credentials_provider, AwsCredentialsProviderBase)
        assert isinstance_str(region)
        assert isinstance_str(service)
        assert isinstance(date, datetime.datetime) or date is None
        assert callable(should_sign_param) or should_sign_param is None
        assert isinstance(body_signing_type, AwsBodySigningConfigType)

        super(AwsSigningConfig, self).__init__()

        if date is None:
            date = datetime.datetime.now(_utc)

        try:
            timestamp = date.timestamp()
        except AttributeError:
            # Python 2 doesn't have datetime.timestamp() function.
            # If it did we could just call it from binding code instead of calculating it here.
            if date.tzinfo is None:
                timestamp = time.mktime(date.timetuple())

def create_client_with_mtls_from_path(cert_filepath, pk_filepath):

        assert isinstance_str(cert_filepath)
        assert isinstance_str(pk_filepath)

        cert_buffer = _read_binary_file(cert_filepath)
        key_buffer = _read_binary_file(pk_filepath)

        return TlsContextOptions.create_client_with_mtls(cert_buffer, key_buffer)

def __init__(self, access_key_id, secret_access_key, session_token=None):
        assert isinstance_str(access_key_id)
        assert isinstance_str(secret_access_key)
        assert isinstance_str(session_token) or session_token is None

        super(AwsCredentials, self).__init__()
        self._binding = _awscrt.credentials_new(access_key_id, secret_access_key, session_token)

def remove_value(self, name, value):
        """
        Remove a specific value for this name.
        Raises a ValueError if value not found.
        """
        assert isinstance_str(name)
        assert isinstance_str(value)
        _awscrt.http_headers_remove_value(self._binding, name, value)

def new_static(cls, access_key_id, secret_access_key, session_token=None):
        """
        Create a simple provider that just returns a fixed set of credentials
        """
        assert isinstance_str(access_key_id)
        assert isinstance_str(secret_access_key)
        assert isinstance_str(session_token) or session_token is None

        binding = _awscrt.credentials_provider_new_static(access_key_id, secret_access_key, session_token)
        return cls(binding)

def set(self, name, value):
        """
        Set a name-value pair, any existing values for the name are removed.
        """
        assert isinstance_str(name)
        assert isinstance_str(value)
        _awscrt.http_headers_set(self._binding, name, value)

def create_server_from_path(cert_filepath, pk_filepath):

        assert isinstance_str(cert_filepath)
        assert isinstance_str(pk_filepath)

        cert_buffer = _read_binary_file(cert_filepath)
        key_buffer = _read_binary_file(pk_filepath)

        return TlsContextOptions.create_server(cert_buffer, key_buffer)

def __init__(self, access_key_id, secret_access_key, session_token=None):
        assert isinstance_str(access_key_id)
        assert isinstance_str(secret_access_key)
        assert isinstance_str(session_token) or session_token is None

        super(AwsCredentials, self).__init__()
        self._binding = _awscrt.credentials_new(access_key_id, secret_access_key, session_token)