diff --git a/controllers/LicensePlate.js b/controllers/LicensePlate.js
index 97278f9..a8f4e38 100644
--- a/controllers/LicensePlate.js
+++ b/controllers/LicensePlate.js
@@ -4,7 +4,7 @@ var utils = require('../utils/writer.js');
 var LicensePlate = require('../service/LicensePlateService');
 
 // Function to handle modifying a license plate
-module.exports.modifyPlate = function modifyPlate (req, res, next, body) {
+module.exports.modifyPlate = function modifyPlate (_,res,__,body) {
   LicensePlate.modifyPlate(body)
     .then(function (response) {
       // Write the response using the utility function
@@ -17,7 +17,7 @@ module.exports.modifyPlate = function modifyPlate (req, res, next, body) {
 };
 
 //Function to handle registering a new license plate
-module.exports.registerPlate = function registerPlate (req, res, next, body) {
+module.exports.registerPlate = function registerPlate (_,res,__,body) {
   LicensePlate.registerPlate(body)
     .then(function (response) {
       // Write the response using the utility function
diff --git a/controllers/Payment.js b/controllers/Payment.js
index 8b00867..768ffac 100644
--- a/controllers/Payment.js
+++ b/controllers/Payment.js
@@ -4,7 +4,7 @@ var utils = require('../utils/writer.js');
 var Payment = require('../service/PaymentService');
 
 //Function to handle making a payment
-module.exports.makePayment = function makePayment (req, res, next, body) {
+module.exports.makePayment = function makePayment (_ ,res,__, body) {
   Payment.makePayment(body)
     .then(function (response) {
       // Write the response using the utility function
@@ -14,4 +14,4 @@ module.exports.makePayment = function makePayment (req, res, next, body) {
       // Write the error response using the utility function
       utils.writeJson(res, response);
     });
-};
+};
\ No newline at end of file
diff --git a/controllers/Reservation.js b/controllers/Reservation.js
index b3a6658..6158bbc 100644
--- a/controllers/Reservation.js
+++ b/controllers/Reservation.js
@@ -4,7 +4,7 @@ var utils = require('../utils/writer.js');
 var Reservation = require('../service/ReservationService');
 
 // Function to handle deleting a reservation
-module.exports.deleteReservation = function deleteReservation (req, res, next, id) {
+module.exports.deleteReservation = function deleteReservation (_, res, __, id) {
   Reservation.deleteReservation(id)
     .then(function (response) {
       // Write the response using the utility function
@@ -17,7 +17,7 @@ module.exports.deleteReservation = function deleteReservation (req, res, next, i
 };
 
 //Function to handle making a reservation
-module.exports.makeReservation = function makeReservation (req, res, next, body) {
+module.exports.makeReservation = function makeReservation (_, res,__, body) {
   Reservation.makeReservation(body)
     .then(function (response) {
       // Write the response using the utility function
@@ -30,7 +30,7 @@ module.exports.makeReservation = function makeReservation (req, res, next, body)
 };
 
 //Function to handle modifying a reservation
-module.exports.modifyReservation = function modifyReservation (req, res, next, body, spotId, userId, startTime, duration, date, id) {
+module.exports.modifyReservation = function modifyReservation (_, res, __, body, spotId, userId, startTime, duration, date, id) {
   Reservation.modifyReservation(body, spotId, userId, startTime, duration, date, id)
     .then(function (response) {
       // Write the response using the utility function
@@ -40,4 +40,4 @@ module.exports.modifyReservation = function modifyReservation (req, res, next, b
       // Write the error response using the utility function
       utils.writeJson(res, response);
     });
-};
+};
\ No newline at end of file
diff --git a/controllers/Spot.js b/controllers/Spot.js
index cd7adb7..9db71a9 100644
--- a/controllers/Spot.js
+++ b/controllers/Spot.js
@@ -4,7 +4,7 @@ var utils = require('../utils/writer.js');
 var Spot = require('../service/SpotService');
 
 //Function to handle creating a new spot
-module.exports.createSpot = function createSpot (req, res, next, body) {
+module.exports.createSpot = function createSpot (_, res, __, body) {
   Spot.createSpot(body)
     .then(function (response) {
       // Write the response using the utility function
@@ -17,7 +17,7 @@ module.exports.createSpot = function createSpot (req, res, next, body) {
 };
 
 //Function to handle retrieving all spots
-module.exports.getSpots = function getSpots (req, res, next) {
+module.exports.getSpots = function getSpots (_, res,__){
   Spot.getSpots()
     .then(function (response) {
       // Write the response using the utility function
@@ -30,7 +30,7 @@ module.exports.getSpots = function getSpots (req, res, next) {
 };
 
 //Function to handle modifying an existing parking spot
-module.exports.modifySpot = function modifySpot (req, res, next, body, address, type, charger, id) {
+module.exports.modifySpot = function modifySpot (_, res,__, body, address, type, charger, id)  {
   Spot.modifySpot(body, address, type, charger, id)
     .then(function (response) {
       // Write the response using the utility function
@@ -43,7 +43,7 @@ module.exports.modifySpot = function modifySpot (req, res, next, body, address,
 };
 
 // Function to handle removing a parking spot
-module.exports.removeSpot = function removeSpot (req, res, next, id) {
+module.exports.removeSpot = function removeSpot (_, res, __, id) {
   Spot.removeSpot(id)
     .then(function (response) {
       // Write the response using the utility function
@@ -56,7 +56,7 @@ module.exports.removeSpot = function removeSpot (req, res, next, id) {
 };
 
 //Function to handle searching for a parking spot
-module.exports.searchSpot = function searchSpot (req, res, next, address, type, charger) {
+module.exports.searchSpot = function searchSpot (_, res, __, address, type, charger) {
   Spot.searchSpot(address, type, charger)
     .then(function (response) {
       // Write the response using the utility function
@@ -66,4 +66,4 @@ module.exports.searchSpot = function searchSpot (req, res, next, address, type,
       // Write the error response using the utility function
       utils.writeJson(res, response);
     });
-};
+};
\ No newline at end of file
diff --git a/controllers/SpotOwner.js b/controllers/SpotOwner.js
index b916a95..66bb84d 100644
--- a/controllers/SpotOwner.js
+++ b/controllers/SpotOwner.js
@@ -4,7 +4,7 @@ var utils = require('../utils/writer.js');
 var SpotOwner = require('../service/SpotOwnerService');
 
 //Function to handle adding a new spot owner
-module.exports.addSpotOwner = function addSpotOwner (req, res, next, body) {
+module.exports.addSpotOwner = function addSpotOwner (_, res, __, body){
   SpotOwner.addSpotOwner(body)
     .then(function (response) {
       // Write the response using the utility function
diff --git a/cypress.config.js b/cypress.config.js
index 97f47c4..b1d06ac 100644
--- a/cypress.config.js
+++ b/cypress.config.js
@@ -2,8 +2,8 @@ const { defineConfig } = require("cypress");
 
 module.exports = defineConfig({
   e2e: {
-    setupNodeEvents(on, config) {
+    setupNodeEvents(_ ,__)  {
       // implement node event listeners here
     },
   },
-});
+});
\ No newline at end of file
diff --git a/service/LicensePlateService.js b/service/LicensePlateService.js
index abcd991..a8d0be2 100644
--- a/service/LicensePlateService.js
+++ b/service/LicensePlateService.js
@@ -103,5 +103,4 @@ exports.registerPlate = function(body) {
 
     resolve();
   });
-};
-
+};
\ No newline at end of file
diff --git a/service/ReservationService.js b/service/ReservationService.js
index abb4437..ba3a170 100644
--- a/service/ReservationService.js
+++ b/service/ReservationService.js
@@ -8,8 +8,8 @@
  * id Integer 
  * no response value expected for this operation
  **/
-exports.deleteReservation = function(id) {
-  return new Promise(function(resolve, reject) {
+exports.deleteReservation = function(_) {
+  return new Promise(function(resolve, _ /*reject*/) {
     resolve();
   });
 }
@@ -112,7 +112,7 @@ exports.makeReservation = function(body) {
  * id Integer 
  * no response value expected for this operation
  **/
-exports.modifyReservation = function(body,spotId,userId,startTime,duration,date,id) {
+exports.modifyReservation = function(body,spotId,userId,_ /*startTime*/ ,_duration ,_date,id) {
   return new Promise(function(resolve, reject) {
  
     // // Η ημερομηνία της κράτησης πρεπει να είναι string (τύπος date)
@@ -182,4 +182,3 @@ exports.modifyReservation = function(body,spotId,userId,startTime,duration,date,
     resolve();
   });
 }
-
diff --git a/service/SpotOwnerService.js b/service/SpotOwnerService.js
index a0ab805..2397334 100644
--- a/service/SpotOwnerService.js
+++ b/service/SpotOwnerService.js
@@ -7,10 +7,8 @@
  **/
 exports.addSpotOwner = function(body) {
   return new Promise((resolve, reject) => {
-
     //idNumber = αριθμός ταυτότητας
     //spots = μια λίστα που περιέχει τις θέσεις που ανήκουν στον ιδιοκτήτη θέσεων.
-    
     // Ορίζω κανόνες εγκυρότητας για κάθε field του Ιδιοκτήτη θέσεων.
     //Αν το id δεν είναι θετικός ακέραιος τότε έχω σφάλμα με κωδικό 400.
     //Αν το idNumber δεν είναι string τότε έχω σφάλμα με κωδικό 400. Το ίδιο ισχύει και για τα name και email.
diff --git a/service/SpotService.js b/service/SpotService.js
index 70446f3..6cf3096 100644
--- a/service/SpotService.js
+++ b/service/SpotService.js
@@ -68,7 +68,7 @@ exports.createSpot = function (body) {
  * returns List
  **/
 exports.getSpots = function () {
-  return new Promise(function (resolve, /**reject*/) { // reject is unused
+  return new Promise(function (resolve, _ /*reject*/) {
     var examples = {};
     examples['application/json'] = [{
       "address": "address",
@@ -169,8 +169,8 @@ exports.modifySpot = function (body, address, type, charger, id) {
  * no response value expected for this operation
  **/
 exports.removeSpot = function (id) {
-  return new Promise(function (resolve, reject) {
-    resolve();  // Διαγράφει τη θέση από το σύστημα
+  return new Promise(function (resolve, _ /*reject*/) {
+    resolve();
   });
 }