Myauth: add missing migration.

Fixes #70

myauth/migrations/0003_auto_20201119_0810.py

@@ -0,0 +1,37 @@
+# Generated by Django 3.1.1 on 2020-11-19 08:10
+
+from django.db import migrations, models
+import myauth.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("myauth", "0002_auto_20200515_0801"),
+    ]
+
+    operations = [
+        migrations.AlterModelManagers(
+            name="user",
+            managers=[
+                ("objects", myauth.models.UserManager()),
+            ],
+        ),
+        migrations.AlterField(
+            model_name="user",
+            name="first_name",
+            field=models.CharField(blank=True, max_length=150, verbose_name="first name"),
+        ),
+        migrations.AlterField(
+            model_name="user",
+            name="username",
+            field=models.CharField(
+                error_messages={"unique": "A user with that username already exists."},
+                help_text="Required. 150 characters or fewer. Letters, digits and ./-/_ only.",
+                max_length=150,
+                unique=True,
+                validators=[myauth.models.UnicodeUsernameValidator()],
+                verbose_name="username",
+            ),
+        ),
+    ]