Aligning Input Boxes

Question

I wanna align my input box into the center but I'm unable to do that. Please help me with that
... Create a code regarding that and send in comments please. The link of my code in which i can't align is below.
https://code.sololearn.com/WdOb2Dce3XPw/?ref=app

Answer 1

<center class="div1"><input class="username" type="text"
required placeholder="username"
</center>

Answer 2

text-align:center;