class SomeSerializer(serializers.ModelSerializer):
first_name = serializers.CharField(validators=[RegexValidator(
regex=(r"^[a-zA-Z_ \- \. \' ]+$"), message="Enter a valid first name")])
phone = serializers.IntegerField(source="user.phone")
Now, this phone field since called an integer field, is giving a validation error, "Enter valid integer". How can I make that a custom message?