Springboot Rest API Build

Hi , Need somone to complete the below task There is one online shopping mobile app which does below. A) Validate user profile (http://localhost:8080/buyservice/validateuser?uname=superman) B) Check his wallet balance (http://localhost:8080/buyservice/getmywalletbalance?uid=123456) C) Place an order and send the confirmation back to user ([login to view URL]) Notes: User maintenance is stored in a table bs_user_det ( fields are uid,uname,pwd,walletbalance) Existing functionality (APIs) The application has already got below API: Placing the order and sending the confirmation message back so available API is: (http://localhost:8080/buyservice/postmyorder?uid=123456&orderid=789) Task for development: Create an API which does below: 1) validate uname/pwd combination and returns uid (Development) 2) gathers info from application of his total ordervalue and orderid and calls walletbalance (balance check (http://localhost:8080/buyservice/getmywalletbalance?uid=123456) to validate if the walletbalance>= ordervalue (Development) 3) Next calls order API http://localhost:8080/buyservice/postmyorder?uid=123456&orderid=789 (No delvelopment needed, can just hardcode the IN and OUT JSON) URI : http://localhost:8080/buyservice/buyitem?uname=superman Service name : buyservice json IN uname: superman Json Out msg: YOur order is successfully placed oid: 789