[credit card] implement payment

uncloud_pay/migrations/0010_auto_20201229_0042.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.1 on 2020-12-29 00:42
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uncloud_pay', '0009_auto_20201229_0037'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='payment',
+            name='timestamp',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+    ]