Add/description expert populate categories

[dangvuthang]

Changelog

• Include field description when login/signup for expert
• Populate field category when get all Transaction as requested

How to test

• Run this command and test if category is populated in the return obj

CURL 'localhost:5000/api/v1/transactions' \
-H 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjYxMTNjOWJkZjAwNWY3MzRhY2NhMTJhOSIsImlhdCI6MTYyOTcxMjA1MCwiZXhwIjoxNjI5ODg0ODUwfQ.27cHsNzOUZNRhlJZAXCEeGw-iO8t4_UyioRgx7h1uFc'

• Run this command and see if description is included in the return obj

  CURL -X POST 'localhost:5000/api/v1/users/login' \
  -H 'Content-Type: application/json' \
  -d '{ "email": "minh@gmail.com","password": "123456" }'