[Update] 维护统一的migrations

apps/users/migrations/0007_auto_20180419_1036.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2018-04-19 02:36
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0006_auto_20180411_1135'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='user',
+            name='otp_secret_key',
+        ),
+        migrations.AddField(
+            model_name='user',
+            name='_otp_secret_key',
+            field=models.CharField(blank=True, max_length=128, null=True),
+        ),
+    ]