POST: http://localhost:3001/signin { "userName":"-----", "password":"_____" }
POST: http://localhost:3001/signup { "name": "-----", "scholarId": "-----", "userName": "-----", "password": "-----" }
GET: http://localhost:3001/subject
POST: http://localhost:3001/subject { "subjectName": "", "subjectCode": "", "totalClasses": "", "attendedClasses": "" }
PUT: http://localhost:3001/subject/:id { "totalClasses": "", "attendedClasses": "" }