updated new username feature to api app; restructured api urlpatterns for more sustainable pahts

src/apps/api/serializers.py

@@ -1,5 +1,7 @@
 from rest_framework import serializers
+
 from apps.dashboard.models import Item, List
+from apps.lyric.models import User
 
 
 class ItemSerializer(serializers.ModelSerializer):
@@ -15,3 +17,8 @@ class ListSerializer(serializers.ModelSerializer):
     class Meta:
         model = List
         fields = ["id", "name", "url", "items"]
+
+class UserSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = User
+        fields = ["id", "username"]