allow async authorization (#109)

* allow async authorization

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: Zsailer

jupyter_server_terminals/handlers.py

@@ -48,7 +48,9 @@ async def get(self, *args: t.Any, **kwargs: t.Any) -> None:
         if self.authorizer is None:
             # Warn if an authorizer is unavailable.
             warn_disabled_authorization()  # type:ignore[unreachable]
-        elif not self.authorizer.is_authorized(self, user, "execute", self.auth_resource):
+        elif not await ensure_async(
+            self.authorizer.is_authorized(self, user, "execute", self.auth_resource)
+        ):
             raise web.HTTPError(403)
 
         if args[0] not in self.term_manager.terminals:  # type:ignore[attr-defined]