Update models.py

www/web/warppay/models.py

@@ -54,9 +54,9 @@ class TransactionLog(models.Model):
 
 class UserCredit(models.Model):
     uid = models.CharField(max_length=100,unique=True)
-    card_id = models.CharField(max_length=10, null=True) # Unique only with django 1.11
+    card_id = models.CharField(null=True, blank=True) # Unique only with django 1.11
     credit = models.FloatField()
-    pinCode = models.CharField(max_length=100, null=True)
+    pinCode = models.CharField(max_length=100, blank=True, null=True)
 
     def __str__(self):
         return self.uid