Allow account registration with invites.

fedireads/migrations/0043_siteinvite.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.0.3 on 2020-06-01 21:31
+
+from django.db import migrations, models
+import fedireads.models.site
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fedireads', '0042_sitesettings'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SiteInvite',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('code', models.CharField(default=fedireads.models.site.new_invite_code, max_length=32)),
+                ('expiry', models.DateTimeField(blank=True, null=True)),
+                ('use_limit', models.IntegerField(blank=True, null=True)),
+                ('times_used', models.IntegerField(default=0)),
+            ],
+        ),
+    ]