Question $4$: Develop test plans, identify test conditions, and design test cases $[8$ points$]$

A$.$ You are testing User Authentication System

Requirements:

Users must input their username and password to $log$ in$.$

The system must verify the entered credentials against the stored user data.

If the entered username does not exist in the system, display an error message.

If the entered password is incorrect, display an error message.

If the entered username and password are correct, allow the user to access their account.

For these requirements, Create the Decision table that shows all test conditions and test

inputs to achieve these requirements $($Valid Test inputs$)?(4$ points$)$