Add github accounts to readme file

How can I add links to GitHub accounts in my readme file.
This is what I want to see:

You can try this code:-

Here is my CSS:

.photos {
  display: inline-block;
  position: relative;
  width: 200px;
  height: 200px;
  overflow: hidden;
  border-radius: 50%;
}

Here is my HTML:

<div class="photos">
<a href="Github Profile url"> 
  <img href="Github profile image source"> 
</a> 
<div class="photos">
<a href="Github Profile url"> 
  <img href="Github profile image soure"> 
</a> 
<div class="photos">
<a href="Github Profile url"> 
  <img href="Github profile image source"> 
</a> 
<div class="photos">
<a href="Github Profile url"> 
  <img href="Github profile image source"> 
</a> 
</div>

For Displaying the word "Authors" you can use

##Authors