How to use the scanapi.utils.validate_keys function in scanapi

def test_should_raise_an_exception(self):
            keys = ["key1"]
            available_keys = ("key1", "key3")
            mandatory_keys = ("key1", "key2")
            scope = "endpoint"

            with pytest.raises(MissingMandatoryKeyError) as excinfo:
                validate_keys(keys, available_keys, mandatory_keys, scope)

            assert str(excinfo.value) == "Missing 'key2' key(s) at 'endpoint' scope"

def _validate(self):
        validate_keys(
            self.spec.keys(), self.ALLOWED_KEYS, self.REQUIRED_KEYS, self.SCOPE
        )

def _validate(self):
        validate_keys(
            self.spec.keys(), self.ALLOWED_KEYS, self.REQUIRED_KEYS, self.SCOPE
        )

def _validate(self):
        validate_keys(self.spec.keys(), self.ALLOWED_KEYS, self.SCOPE)

def _validate(self):
        if self.is_root:
            return validate_keys(
                self.spec.keys(), self.ALLOWED_KEYS, self.ROOT_REQUIRED_KEYS, ROOT_SCOPE
            )

        validate_keys(
            self.spec.keys(), self.ALLOWED_KEYS, self.REQUIRED_KEYS, self.SCOPE
        )

def _validate(self):
        if self.is_root:
            return validate_keys(
                self.spec.keys(), self.ALLOWED_KEYS, self.ROOT_REQUIRED_KEYS, ROOT_SCOPE
            )

        validate_keys(
            self.spec.keys(), self.ALLOWED_KEYS, self.REQUIRED_KEYS, self.SCOPE
        )