sync improvements

allow blank for teamsnap fields

teamsnap/migrations/0004_auto_20211222_0957.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.2.6 on 2021-12-22 15:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('teamsnap', '0003_auto_20211219_2058'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='event',
+            name='is_game',
+            field=models.BooleanField(null=True),
+        ),
+        migrations.AlterField(
+            model_name='member',
+            name='is_non_player',
+            field=models.BooleanField(null=True),
+        ),
+    ]