Created the link model / schema

models/Link.js

@@ -0,0 +1,31 @@
+const mongoose = require('mongoose');
+const crypto = require("crypto");
+
+const LinkSchema = new mongoose.Schema({
+    token: { // The token used to log in into the socket
+        type: String,
+        default: () => crypto.randomBytes(48).toString('hex')
+    },
+    user_id: { // The id of the user linked to the server
+        type: mongoose.Schema.ObjectId,
+        required: true
+    },
+    name: { // The name of the server
+        type: String,
+        required: true
+    },
+    linked: { // The status indicating whether the server has been connected at least once
+        type: Boolean,
+        default: false
+    },
+    online: { // The status indicating whether the server is currently connected to the socket
+        type: Boolean,
+        default: false
+    },
+    added: { // The date when the server has been linked
+        type: Date,
+        default: Date.now
+    }
+});
+
+module.exports = mongoose.model('links', LinkSchema);