Basic OTP Admin Panel Automation

I already have a website with a login system (username and password).

I need a simple web-based admin panel (console) that allows me to manually approve customer logins by comparing an SMS code.

How it should work

1 The customer logs in with their username and password.
2 My website asks the customer to enter the SMS code they received.
3 I send the SMS code manually from my phone (outside the website).
4 In the admin panel, I can see the customer's login request live.
5 The admin panel should display:
- Username
- Password
- The code entered by the customer
- Status (Waiting / Approved / Rejected)
6 I manually compare the code with the one I sent.
7 If the code is correct, I click Approve.
8 If the code is incorrect, I click Reject.
9 The customer is allowed to log in only after I approve the request.

Requirements

No SMS API integration.
No automatic OTP generation.
No database is required if another simple solution is easier.
The admin panel should update live without refreshing the page.
Clean and simple interface.
The code should be easy to integrate into my existing website.