How to make jquery terminal cursor a block, but an underscore?

How can I change the jquery terminal cursor so it can be like in the picture here: picture. I have tried messing with the css, and I was able to change the shape a bit using .cmd in css but it wouldnt change the thickness and height making it noneffective.

I do know there is a variable called: --animation: terminal-bar that you can add to the terminal's css but im not sure if there is one that can make it an underscore.

In the documentation it says

To change font size of the terminal you can use this code:

toggle highlight .terminal, .cmd, .terminal .terminal-output div div, .cmd .prompt {
    font-size: 20px;
    line-height: 24px; 
} 

Or from version 1.0.0 (and if you don't care about IE or Edge) you can simplify the code using --size css variables like this:

toggle highlight .terminal {   
   --size: 2;
}

Demo:

$('body').terminal(
  function(command, term) {
    if (command == 'test') {
      term.echo("you just typed 'test'");
    } else {
      term.echo('unknown command');
    }
  }, {
    prompt: 'user@host:~ $ ',
    greetings: false
  }
);

.terminal {
  --background: black;
  --color: rgba(0, 255, 0, 0.99);
  --size: 1.3;
  --animation: terminal-underline;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.terminal/2.37.1/js/jquery.terminal.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/jquery.terminal/2.37.1/css/jquery.terminal.min.css" rel="stylesheet" />