HEADER-LINE FORM : 

GET: http://localhost:9119/api/teacher
GET: http://localhost:9119/api/teacher/{id}
PUT: http://localhost:9119/api/teacher/{id}
DELETE: http://localhost:9119/api/teacher/{id} : NEED TO MODIFY THE INCORRECT ID INPUT ERROR HANDLING
POST: http://localhost:9119/api/teacher
===EX1===
{
    "name": "niladri",
    "email": "sen.niladri6@gmail.com",
    "phoneNumber": 6291,
    "salary": 1000.0,
    "students": [{
        "name": "paku",
        "depertment": "CSE",
        "rollNumber": 108
    }]
}
===EX2===:
{
    "name": "sandipan",
    "email": "sandy@gmail.com",
    "phoneNumber": 9038,
    "salary": 2000.0,
    "students": [
        {
        "name": "sahil",
        "depertment": "CSE",
        "rollNumber": 111
        },
        {
        "name": "tarun",
        "depertment": "CSE",
        "rollNumber": 121
        }
    ]
}

===== 6.11.36
user.java class code changed
@Getter @Setter private List<Role> role;
TokenUtil class code change

===== 9.11.20
1.8
=== SWAGGER UI ====
http://localhost:9119/swagger-ui.html

=========
GIT HUB COMMAND
=========
$ git commit -m "your mesage"
$ git push origin main
$ git status

$ git push origin main