Add YoutubeCredentials model and implement YouTube OAuth login functionality

game/migrations/0008_youtubecredentials.py

@@ -0,0 +1,37 @@
+# Generated by Django 5.2.3 on 2025-06-13 20:16
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("game", "0007_remove_musikgame_music_videos_musicgameorder"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="YoutubeCredentials",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("credentials", models.JSONField()),
+                (
+                    "user",
+                    models.OneToOneField(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+        ),
+    ]