make get_user() return None if user not found

api/python/quilt3/admin/__init__.py

@@ -62,17 +62,16 @@ def _get_client():
     return Client()
 
 
-def get_user(name: str) -> User:
+def get_user(name: str) -> Optional[User]:
     """
-    Get a specific user from the registry.
+    Get a specific user from the registry. Return `None` if the user does not exist.
 
     Args:
         name: Username of user to get.
     """
     result = _get_client().get_user(name=name)
-    # XXX: should we really throw an exception here?
     if result is None:
-        raise UserNotFoundError
+        return None
     return User.model_validate(result.model_dump())
 
 

docs/api-reference/Admin.md

@@ -28,9 +28,9 @@ validated to form a valid model.
 
 `self` is explicitly positional-only to allow `self` as a field name.
 
-## get\_user(name: str) -> quilt3.admin.User  {#get\_user}
+## get\_user(name: str) -> Optional[quilt3.admin.User]  {#get\_user}
 
-Get a specific user from the registry.
+Get a specific user from the registry. Return `None` if the user does not exist.
 
 __Arguments__