Backend additions for stocks feature

[varunm532]

Completed:

• Created tables named stock, stock_transactions, and added collum in users table to show user money
• added necessary changes to model/users.py for database tables
• made an API endpoint to display info from the stock table
• made an API endpoint to display info from the stock_transactions table( specific to the user logged in)
• made an API endpoint for buying stocks
• made an API endpoint to show how many stocks a person owns, its value, and quantity owned
• made an API endpoint to display how much money the user has by taking data from the new stockmoney collum in the users table

  Incomplete

  • need to make an API endpoint that deals with selling stocks
  • need to make an API endpoint to show a graph that shows the user's money changes
  • need to edit display API endpoint to utilize 3rd party endpoint to update stock prices in realtime

[varunm532]

Completed

• finshed endpoint for selling
• finished endpoint for graph
• edited endpoint to use 3rd party