cookies authentication

Hi everyone hope you are doing well,

I would like to achieve as below in c#, but I have no idea how to do it

1. paths:
2. /login:
3. post:
4. summary: Logs in and returns the authentication cookie
5. requestBody:
6. required: true
7. description: A JSON object containing the login and password.
8. content:
9. application/JSON:
10. schema:
11. $ref: '#/components/schemas/LoginRequest'
12. security: [] # no authentication
13. responses:
14. '200':
15. description: >
16. Successfully authenticated.
17. The session ID is returned in a cookie named `JSESSIONID`. You need to include this cookie in subsequent requests.
18. headers:
19. Set-Cookie:
20. schema:
21. type: string
22. example: JSESSIONID=abcde12345; Path=/; HttpOnly