provide mitigation ideas to one account per user limit

Author: nazarewk

src/pages/how-to/add-users-to-your-network.mdx

@@ -43,8 +43,15 @@ After logging in to the system, they will join your network automatically.
 </p>
 
 <Note>
-    If a user already has a NetBird account, you can't invite them.
+    If a user already has a NetBird account with the email you are using to invite them, you can’t invite them.
     This is a limitation that is likely to be removed in future versions.
+
+    You can mitigate this issue with those approaches:
+    - invite an aliased email (most email providers support those), 
+      for example invite `[email protected]` instead of `[email protected]`,
+    - ask the user to log in and delete his/her organization (if it's the only user in the organization),
+    - ask the user organization's Admin/Owner to delete their user account,
+       - (optionally) transfer the Owner and/or Admin role to somebody else at user's ogranization first,
 </Note>
 
 ## Identity Provider (IdP) Sync