reworked invite system

cookbook/migrations/0123_invitelink_email.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.3 on 2021-05-28 12:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0122_auto_20210527_1712'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invitelink',
+            name='email',
+            field=models.EmailField(blank=True, max_length=254),
+        ),
+    ]