pynamodbOverride override init for pynamodb example

pynamodb_override.py

#export
from nicHelper.pynamodb import SuperModel
from pynamodb.attributes import JSONAttribute, NumberAttribute, UnicodeAttribute
class PaymentRecordTable(SuperModel):
    
  data = JSONAttribute(null=True)
  timestamp = NumberAttribute(hash_key=True)
  userId = UnicodeAttribute()
  
  def __init__(self, hash_key=None, range_key=None, _user_instantiated=True, **kwargs):
    super().__init__(hash_key=hash_key, range_key=range_key, _user_instantiated=_user_instantiated, **kwargs)
    self.timestamp = datetime.now().timestamp()