enterprise/api/v1/serializers.py
def validate_username(self, value):
        """
        Verify that the username has a matching user.
        """
        try:
            self.user = User.objects.get(username=value)
        except User.DoesNotExist:
            raise serializers.ValidationError("User does not exist")

        return value
def validate_username(self, value):
        """
        Verify that the username has a matching user.
        """
        try:
            self.user = User.objects.get(username=value)
        except User.DoesNotExist:
            raise serializers.ValidationError("User does not exist")

        return value
Verify that the username has a matching user.