fix: update command options

tutor/commands/jobs.py

@@ -318,15 +318,15 @@ def sqlshell(args: list[str]) -> t.Iterable[tuple[str, str]]:
 
 
 @click.command(context_settings={"ignore_unknown_options": True})
-@click.option(
-    "--users",
+@click.argument(
+    "users",
     is_flag=False,
-    nargs=1,
-    help="Specific users to upgrade the authentication plugin of. Requires comma-seperated values with no space in-between.",
+    nargs=-1,
+    help="Update the authentication plugin of one or more users. Specify 'all' to update all users at once.",
 )
 @click.pass_obj
 def update_mysql_authentication_plugin(
-    context: Context, users: str
+    context: Context, users: tuple[str]
 ) -> t.Iterable[tuple[str, str]]:
     """
     Update the authentication plugin of MySQL users from mysql_native_password to caching_sha2_password
@@ -342,7 +342,9 @@ def update_mysql_authentication_plugin(
         )
         return
 
-    users_to_update = users.split(",") if users else list(plugins.iter_loaded())
+    update_all = "all" in users
+
+    users_to_update = list(plugins.iter_loaded()) if update_all else users.split(",")
 
     query = get_mysql_change_authentication_plugin_query(
         config, users_to_update, not users