Add Auth0 as sponsor.

assets/styles/all.css

@@ -4253,6 +4253,45 @@ body.is-search .search-con {
   line-height: 1.8;
   font-size: 18px;
 }
+@media (min-width: 768px) {
+  .sponsors .platinum {
+    clear: both;
+    *zoom: 1;
+    width: auto;
+    margin-right: 0;
+    max-width: 890px;
+    padding: 0 20px;
+    margin: 0 auto;
+    text-align: center;
+  }
+  .sponsors .platinum:after {
+    clear: both;
+  }
+  .sponsors .platinum:after,
+  .sponsors .platinum:before {
+    content: "";
+    display: table;
+  }
+  .sponsors .platinum .item {
+    float: left;
+    width: 100%;
+    padding-right: 0;
+    background-clip: content-box;
+    box-sizing: border-box;
+  }
+}
+@media (min-width: 768px) {
+  .sponsors .platinum .item a {
+    x-height: 180px;
+  }
+}
+.sponsors .platinum .item img {
+  max-width: 366px;
+  max-height: 96px;
+}
+.sponsors .platinum .item p {
+  line-height: 22px;
+}
 @media (min-width: 768px) {
   .sponsors .gold {
     clear: both;

sponsors/index.html

@@ -96,6 +96,12 @@ <h1>Sponsors</h1><p>Passport is an open source project.  Ongoing development is
 consider supporting Passport by <a href="https://github.com/sponsors/jaredhanson?metadata_source=passportjs&metadata_medium=referral&metadata_campaign=sponsors">becoming a sponsor</a>.</p>
 
           </div>
+          <div class="platinum">
+            <div class="item"><a rel="sponsored" href="https://auth0.com/"><img src="auth0.png">
+                <p><b>Simple Authentication</b><br>Make login our problem. Not yours.</p>
+                <p>Auth0 by Okta provides a simple and customizable login page to authenticate your users. You can dynamically add new capabilities to it - including social login, multi-factor authentication, or passkeys - without making changes to your app’s code.</p>
+                <p>We help protect your app and your users from attacks - defending your application from bot attacks and detecting runtime anomalies based on suspicious IPs, breached credentials, user context, and more.</p></a></div>
+          </div>
           <div class="gold">
             <div class="item"><a rel="sponsored" href="https://workos.com/?utm_campaign=github_repo&amp;utm_medium=referral&amp;utm_content=passport_js&amp;utm_source=github"><img src="workos.png">
                 <p><b>Your app, enterprise-ready.</b><br>Start selling to enterprise customers with just a few lines of code. Add Single Sign-On (and more) in minutes instead of months.</p></a></div>