How to add existing ssh key to project's deploy key in gitlab
<p>I'm using gitlab.com, and I'm not that used to with SSH Keys. BTW I've managed to create a SSH Key in my Windows 8 PC using cmd and Git bash. And I've managed to add that to my gitlab user account.</p>

<p>Now in my project "Deploy Keys" I'm seeing:
<a href="https://i.stack.imgur.com/pWKaw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pWKaw.png" alt="Deploy Keys - gitlab.com"></a></p>

<p>If I try to paste the same key here too, it's not adding because it's already taken.</p>

<p>The question can be answered by either of the following two:</p>

<ul>
<li>How can I add the existing one then? or,</li>
<li>How can I make my SSH key active for my project, so that I can push into private repo of gitlab without username and password prompt?</li>
</ul>