Enhance cmdkey completion:

- error fixes
- more accurate hints

share/completions/cmdkey.fish

@@ -1,21 +1,34 @@
 function __cmdkey_generate_args --description 'Function to generate args'
-  if not __fish_seen_argument --windows 'add' --windows 'generic'
-    echo -e '/add\tAdd a user name and password to the list
-/generic\tAdd generic credentials to the list'
-  end
+  set --local current_token (commandline --current-token --cut-at-cursor)
+  set --local previous_token (commandline --tokenize --cut-at-cursor)[-1]
 
-  if not __fish_seen_argument --windows 'smartcard' --windows 'user'
-    echo -e '/smartcard\tRetrieve the credential from a smart card
+  switch $current_token
+    case '/user:*'
+      __fish_list_windows_users
+    case '*'
+      if test "$previous_token" = '/delete'
+        echo -e '/ras\tDelete remote access entry'
+        return
+      end
+
+      if not __fish_seen_argument --windows 'add:' --windows 'generic:'
+        echo -e '/add:\tAdd a user name and password to the list
+/generic:\tAdd generic credentials to the list'
+      end
+    
+      if not __fish_seen_argument --windows 'smartcard' --windows 'user:'
+        echo -e '/smartcard\tRetrieve the credential from a smart card
 /user:\tSpecify the user or account name to store with this entry'
-  end
-
-  if __fish_seen_argument --windows 'user'
-    echo -e '/pass\tSpecify the password to store with this entry'
-  end
-
-  echo -e '/delete\tDelete a user name and password from the list
+      end
+    
+      if __fish_seen_argument --windows 'user:'
+        echo -e '/pass:\tSpecify the password to store with this entry'
+      end
+    
+      echo -e '/delete\tDelete a user name and password from the list
 /list:\tDisplay the list of stored user names and credentials
 /?\tShow help'
+  end
 end
 
 complete --command cmdkey --no-files --arguments '(__cmdkey_generate_args)'