Registered models on admin.py.

ianaragoza_music/homepage/admin.py

 from django.contrib import admin
+from .models import Artist, Album, Song
 
 # Register your models here.
+
+class ArtistAdmin(admin.ModelAdmin):
+    model = Artist
+
+class AlbumAdmin(admin.ModelAdmin):
+    model = Album
+    
+class SongAdmin(admin.ModelAdmin):
+    model = Song
\ No newline at end of file