[O] Warn user that they can't undo deleting account

ProjectClock/Account.swift

@@ -216,7 +216,11 @@ class ManageVC: UIViewController
      */
     @IBAction func deleteAccount(_ sender: Any)
     {
-        sendReq(APIs.delete, title: "Deleting...")
+        enterPin("Are you sure?", "Enter 1234 to continue deleting your account, you can't undo this.")
+        {
+            guard $0 == "1234" else { return }
+            
+            self.sendReq(APIs.delete, title: "Deleting...")
             {
                 print("Deleted! \($0)")
                 self.msg("Deleted!", "You are erased from our database, you no longer exist.")
@@ -224,6 +228,7 @@ class ManageVC: UIViewController
             }
         }
     }
+}
 
 /**
  Family view controller that displays family info or create/join family buttons