Use always the invite link to slack

Author: mpmont

app/Views/discuss.php

@@ -57,7 +57,7 @@ class="link-primary" target="_blank">signup</a> for it :)
             </p>
 
             <p>
-                <a href="https://codeigniterchat.slack.com/" class="buttons-reverse" target="_blank">Slack</a>
+                <a href="https://join.slack.com/t/codeigniterchat/shared_invite/zt-rl30zw00-obL1Hr1q1ATvkzVkFp8S0Q" class="buttons-reverse" target="_blank">Slack</a>
             </p>
             <br /><br />
         </div><!--inner-page-text-box ends here-->

app/Views/layouts/_footer.php

@@ -35,7 +35,7 @@
                 </div>
             </a>
 
-            <a href="https://codeigniterchat.slack.com/" target="_blank" aria-label="Slack Chat">
+            <a href="https://join.slack.com/t/codeigniterchat/shared_invite/zt-rl30zw00-obL1Hr1q1ATvkzVkFp8S0Q" target="_blank" aria-label="Slack Chat">
                 <div class="links-icons">
                     <div class="icon">
                       <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50" width="50" height="50"><path d="M31 24c-2.757 0-5-2.243-5-5V7c0-2.757 2.243-5 5-5s5 2.243 5 5v12c0 2.757-2.243 5-5 5zM43 24h-4a1 1 0 0 1-1-1v-4c0-2.757 2.243-5 5-5s5 2.243 5 5-2.243 5-5 5zM19 24H7c-2.757 0-5-2.243-5-5s2.243-5 5-5h12c2.757 0 5 2.243 5 5s-2.243 5-5 5zM23 12h-4c-2.757 0-5-2.243-5-5s2.243-5 5-5 5 2.243 5 5v4a1 1 0 0 1-1 1zM19 48c-2.757 0-5-2.243-5-5V31c0-2.757 2.243-5 5-5s5 2.243 5 5v12c0 2.757-2.243 5-5 5zM7 36c-2.757 0-5-2.243-5-5s2.243-5 5-5h4a1 1 0 0 1 1 1v4c0 2.757-2.243 5-5 5zM43 36H31c-2.757 0-5-2.243-5-5s2.243-5 5-5h12c2.757 0 5 2.243 5 5s-2.243 5-5 5zM31 48c-2.757 0-5-2.243-5-5v-4a1 1 0 0 1 1-1h4c2.757 0 5 2.243 5 5s-2.243 5-5 5z"/></svg>