Fix Login (#1501)

* changes

* format

demo/hello_login/run.py

@@ -9,4 +9,6 @@ def greet(name):
 
 demo = gr.Interface(fn=greet, inputs="text", outputs="text")
 if __name__ == "__main__":
-    demo.launch(auth=lambda u, p: user_db.get(u) == p)
+    demo.launch(
+        auth=lambda u, p: user_db.get(u) == p,
+        auth_message="This is a welcome message")

ui/packages/app/src/Login.svelte

@@ -1,5 +1,9 @@
 <script lang="ts">
 	export let root: string;
+	export let id: number;
+	export let auth_message: string | null;
+
+	window.__gradio_loader__[id].$set({ status: "complete" });
 </script>
 
 <div class="login container mt-8">
@@ -10,7 +14,9 @@
 		action={root + "login"}
 	>
 		<h2 class="text-2xl font-semibold my-2">login</h2>
-
+		{#if auth_message}
+			<p class="my-4">{auth_message}</p>
+		{/if}
 		<label class="block uppercase mt-4" for="username">username</label>
 		<input class="p-2 block" type="text" name="username" />
 		<label class="block uppercase mt-4" for="password">password</label>