Update README to include vpn management commands

README.md

@@ -77,3 +77,27 @@ out in ~/vcs/ungleich-ssh-keys
 ```
 ungleich sshkey  --key raul.ascencio --host dev.raul.ungleich.cloud
 ```
+
+### Usage: VPN Management
+
+Creating a new VPN:
+
+```
+ungleich vpn-create \
+    --server_url <server_url>
+    --name <name> 
+    --realm <realm>
+    --seed <seed_value> 
+    --email <email>
+    --public_key <public_key>
+```
+
+Deleting a VPN:
+
+```
+ungleich vpn-delete \
+    --server_url <server_url>
+    --name <name> 
+    --realm <realm>
+    --seed <seed_value>
+```