Project: nosql
Task (easy): 1) create a new api (GET /api/usernames) by creating api route file  (app/api/usernames/route.ts) 2) in this api, return a string list in body to get all usernames in User Model (model/user.ts), example: ['user1', 'user2'] 3) Hint: import User from '@/model/user' to get Model of User and get usernames by mongoose API