diff --git a/.vscode/settings.json b/.vscode/settings.json
index 05d23f3bbc..958a4a775c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -10,5 +10,10 @@
     "eslint.format.enable": true,
     "[javascript]": {
         "editor.defaultFormatter": "dbaeumer.vscode-eslint"
-    }
+    },
+    "cSpell.words": [
+        "loopback",
+        "salix",
+        "fdescribe"
+    ]
 }
diff --git a/back/models/vn-user.js b/back/models/vn-user.js
index 29c51509dc..6b9b9bab58 100644
--- a/back/models/vn-user.js
+++ b/back/models/vn-user.js
@@ -124,6 +124,14 @@ module.exports = function(Self) {
 
         return email.send();
     });
+
+    /**
+     * Sign-in validate.     *
+     * @param {Integer} user The user
+     * @param {Object} userToken Options
+     * @param {Object} token accessToken
+     * @param {Object} ctx context
+     */
     Self.signInValidate = async(user, userToken, token, ctx) => {
         const [[key, value]] = Object.entries(Self.userUses(user));
         const isOwner = Self.rawSql(`SELECT ? = ? `, [userToken[key], value]);
@@ -139,6 +147,12 @@ module.exports = function(Self) {
         }
     };
 
+    /**
+     * Validate login params*
+     * @param {String} user The user
+     * @param {String} password
+      * @param {Object} ctx context
+     */
     Self.validateLogin = async function(user, password, ctx) {
         const loginInfo = Object.assign({password}, Self.userUses(user));
         const token = await Self.login(loginInfo, 'user');