DynamoDB table for user-specific information

[jdchoi77]

Create a DynamoDB table for user-specific information. The entry gets populated whenever a new user_id is encountered. The key is user_id and the value is a dictionary comprising:

• name: str
• gender: str
• hobbies: List[str]
• favorite_movie: List[str]
• favorite_food: List[str]
• favorite_book: List[str]

[sfillwo]

Cobot has a default user_attribute table that gets populated for each new user based on user_id. We can save any fields that we want to it, and retrieve them during the conversation.