Fix login issue with different case usernames

backend/server/users/serializers.py

@@ -136,7 +136,7 @@ class UserDetailsSerializer(serializers.ModelSerializer):
             return username
 
         from allauth.account.adapter import get_adapter
-        username = get_adapter().clean_username(username)
+        username = get_adapter().clean_username(username.lower())  # Convert username to lowercase
         return username
 
     class Meta:

frontend/src/lib/components/Toast.svelte

@@ -9,7 +9,7 @@
 	});
 </script>
 
-<div class="toast toast-top toast-end z-50 min-w-20">
+<div class="toast toast-top mt-14 toast-end z-50 min-w-20">
 	{#each toastList as { type, message, id, duration }}
 		{#if type == 'success'}
 			<div class="alert alert-success">