A server room security console allows log-in access to only two network administrators. Their credentials are shown in Table 1 below:

Table 1

Develop an algorithm, using either pseudo-code or a flowchart, to authenticate logging into the console.

The algorithm must:

• Prompt the user to enter their username and passcode.
• Check if the username and passcode combination is correct.
• If correct, output 'system unlocked'.
• If incorrect, continually prompt the user to re-enter both their username and passcode until a valid combination is entered.