check_password in contrib auth tries to update the database

Hi,

I am getting this error 

cannot execute UPDATE in a read-only transaction

from a method in auth module that supposedly checks for password.

check_password method of AbstractBaseUser in django.contrib.auth.models tries to update the database.
This causes problems when this code executes on a read-only slave database.

Here is the source code of the method:

    def check_password(self, raw_password):
        """
        Returns a boolean of whether the raw_password was correct. Handles
        hashing formats behind the scenes.
        """
        def setter(raw_password):
            self.set_password(raw_password)
            self.save(update_fields=["password"])
        return check_password(raw_password, self.password, setter)

Has anyone come across this issue before? 

--
Suhrid

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