docs(ui.md): add docs on self serve ui flow

docs/my-website/docs/proxy/ui.md

@@ -1,3 +1,5 @@
+import Image from '@theme/IdealImage';
+
 # [BETA] Self-serve UI 
 
 Allow your users to create their own keys through a UI
@@ -8,4 +10,54 @@ This is in beta, so things may change. If you have feedback, [let us know](https
 
 :::
 
+## Quick Start
 
+Requirements: 
+
+- Need to a [Resend](https://resend.com/) account for sending emails 
+
+[**See code**](https://github.com/BerriAI/litellm/blob/61cd800b9ffbb02c286481d2056b65c7fb5447bf/litellm/proxy/proxy_server.py#L1782)
+
+### Step 1. Save Resend keys
+
+```env
+export RESEND_API_KEY="my-resend-api-key" 
+export RESEND_API_EMAIL="my-resend-sending-email" # e.g. krrish@berri.ai
+```
+
+### Step 2. Enable user auth 
+
+In your config.yaml, 
+
+```yaml
+general_settings:
+    # other changes
+    allow_user_auth: true
+```
+
+This will enable:
+* Users to create keys via `/key/generate` (by default, only admin can create keys)
+* The `/user/auth` endpoint to send user's emails with their login credentials (key + user id)
+
+### Step 3. Connect to UI 
+
+You can use our hosted UI (https://dashboard.litellm.ai/) or [self-host your own](https://github.com/BerriAI/litellm/tree/main/ui). 
+
+If you self-host, you need to save the UI url in your proxy environment as `LITELLM_HOSTED_UI`. 
+
+Connect your proxy to your UI, by entering: 
+1. The hosted proxy URL 
+2. Accepted email subdomains
+3. [OPTIONAL] Allowed admin emails 
+
+<Image img={require('../../img/admin_dashboard.png')} />  
+
+## What users will see? 
+
+### Auth 
+
+<Image img={require('../../img/user_auth_screen.png')} />  
+
+### Create Keys 
+
+<Image img={require('../../img/user_create_key_screen.png')} />  

ui/pages/user.py

@@ -76,12 +76,17 @@ def auth_page(page_param: str):
         else:
             post_endpoint = f"{decoded_params['proxy_url']}/user/auth"
 
-        try:
-            assert email.split("@")[1] in decoded_params["accepted_email_subdomain"]
-        except:
-            raise Exception(
-                f"Only emails from {decoded_params['accepted_email_subdomain']} are allowed"
-            )
+        if (
+            decoded_params["accepted_email_subdomain"] == "*"
+        ):  # if user wants to allow all emails
+            pass
+        else:
+            try:
+                assert email.split("@")[1] in decoded_params["accepted_email_subdomain"]
+            except:
+                raise Exception(
+                    f"Only emails from {decoded_params['accepted_email_subdomain']} are allowed"
+                )
         response = requests.post(
             post_endpoint, json={"user_email": email, "page": page_param}
         )