As a user, I want to store the information about the User so that I can create an account and write reviews

[Hieu114]

Acceptance criteria

• Create a User table with primary key id and attributes username, hashpass, and image_url.
• Define any constrain in the database if neccessary
• Provide functions SELECT, INSERT, DELETE, UPDATE for User table
• Raise errors if a function violates any pre-defined constrain

Tasks

• Create class User with pre-defined fields
• Populate a uuid for each instance with username as the primary key
• Create a method to search for the uuid with the username
• Create a method to insert a new User to the database
• Create a method to delete a user from the database
• Create a method to update an instance in the database
• Create a method to show the values in a User instance