link between servers & groups, clean, bug fix

model/access.model.js

@@ -0,0 +1,20 @@
+const { Model, DataTypes} = require('sequelize');
+const sequelize = require('../services/database.service');
+
+class Access extends Model {}
+
+Access.init({
+    serverHostname: {
+        type: DataTypes.STRING,
+        required: true,
+    },
+    groupName: {
+        type: DataTypes.INTEGER,
+        required: true,
+    }
+}, {
+    sequelize,
+    modelName: 'access'
+})
+
+module.exports = Access;

model/server.model.js

@@ -7,6 +7,8 @@ Server.init({
     hostname: {
         type: DataTypes.STRING,
         required: true,
+        unique: true,
+        primaryKey: true,
     },
     ip: {
         type: DataTypes.STRING,

model/user.model.js

@@ -7,6 +7,7 @@ User.init({
     id: {
         type: DataTypes.INTEGER,
         primaryKey: true,
+        unique: true,
         required: true,
     },
     admin: {