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

src/core/urls.py

@@ -1,14 +1,16 @@
 from django.contrib import admin
 from django.http import HttpResponse
 from django.urls import include, path
+
 from apps.dashboard import views as dash_views
 
+
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('', dash_views.home_page, name='home'),
+    path('api/', include('apps.api.urls')),
     path('dashboard/', include('apps.dashboard.urls')),
     path('lyric/', include('apps.lyric.urls')),
-    path('api/lists/', include('apps.api.urls')),
 ]
 
 # Please remove the following urlpattern