..
        if features.SUPERUSERS_ORG_CREATION_ONLY and not SuperUserPermission().can():
            raise Unauthorized()


        user = get_authenticated_user()
        org_data = request.get_json()
        existing = None


        # Super users should be able to create new orgs regardless of user restriction
        if user.username not in app.config.get("SUPER_USERS", None):
            if features.RESTRICTED_USERS and usermanager.is_restricted_user(user.username):
                raise Unauthorized()
...

def is_restricted_user(self, username: str, include_robots: bool = True) -> bool:
        """
        Returns if the given username represents a restricted user.
        """
        if include_robots:
            username = username.split("+", 1)[0]


        if super().restricted_whitelist_is_set() and not super().is_restricted_user(username):
            return False


        return self.federated_users.is_restricted_user(username) or super().is_restricted_user(
            username
        )

def is_restricted_user(self, username: str, include_robots: bool = True) -> bool:
        if include_robots:
            username = username.split("+")[0]


        if self._restricted_users_array:
            usernames = self._restricted_users_array.value.decode("utf8").split(",")
            return not (username in usernames)
        else:
            return True