diff --git a/server/controllers/studentController.js b/server/controllers/studentController.js
index 7a8d16ce..944ec901 100644
--- a/server/controllers/studentController.js
+++ b/server/controllers/studentController.js
@@ -52,7 +52,8 @@ const upsert = (req, res) => {
           .catch((err) => {
             res.status(400);
             res.send({
-              message: "creating course failed!",
+              success: false,
+              message: err.message,
             });
           });
       }
diff --git a/server/postman.rest b/server/postman.rest
index 106940c0..3a3de653 100644
--- a/server/postman.rest
+++ b/server/postman.rest
@@ -1,5 +1,5 @@
 ### register 
-POST http://localhost:3000/api/auth/register HTTP/1.1 
+POST http://192.168.31.22:3100/api/auth/register HTTP/1.1 
 Content-Type: application/json
 
 {
@@ -9,7 +9,7 @@ Content-Type: application/json
 }
 
 ### 
-POST http://localhost:3000/api/auth/login HTTP/1.1 
+POST http://192.168.31.22:3100/api/auth/login HTTP/1.1 
 Content-Type: application/json
 
 {
@@ -18,24 +18,24 @@ Content-Type: application/json
 }
 
 ### 
-POST http://localhost:3000/api/auth/refresh HTTP/1.1 
+POST http://192.168.31.22:3100/api/auth/refresh HTTP/1.1 
 Content-Type: application/json 
-Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiJkN2JhZjY4OC1hODc5LTRlNTMtOTJkMi1kMmJiYmJmMjZlZTEiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk2MzY0ODQsImV4cCI6MTYyOTYzOTE4NH0.AEo9QY4XEs9o9MuT4uriB69qChV6dALa8TvwGzNV2Xk
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiIwZjczMTA5ZC0xODJhLTQ1ZTAtYjZjOS0xYjUxY2NkM2IzYmMiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk3Mjk5ODYsImV4cCI6MTYyOTczMjY4Nn0._f_tSAr-cvCq7nxRh2Jhdgw27QDMEq_0j3sQVZJBAYM
 
 ### 
-POST http://localhost:3000/api/auth/logout HTTP/1.1 
+POST http://192.168.31.22:3100/api/auth/logout HTTP/1.1 
 Content-Type: application/json 
-Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiJkN2JhZjY4OC1hODc5LTRlNTMtOTJkMi1kMmJiYmJmMjZlZTEiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk2MzY0ODQsImV4cCI6MTYyOTYzOTE4NH0.AEo9QY4XEs9o9MuT4uriB69qChV6dALa8TvwGzNV2Xk
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiIwZjczMTA5ZC0xODJhLTQ1ZTAtYjZjOS0xYjUxY2NkM2IzYmMiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk3Mjk5ODYsImV4cCI6MTYyOTczMjY4Nn0._f_tSAr-cvCq7nxRh2Jhdgw27QDMEq_0j3sQVZJBAYM
 
 ### 
-GET http://localhost:3000/api/student/
+GET http://192.168.31.22:3100/api/student/
 Content-Type: application/json 
-Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiI0Y2FmMmU5My03NTZjLTRhZDAtODY3OC1kZjMyNmUyMGQ2NzIiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk2MzY3MjIsImV4cCI6MTYyOTYzOTQyMn0.xC1Lk4LirBYafwDHkcYQbm2JPOkl7BvKhbY7x7NZIy0
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiIwZjczMTA5ZC0xODJhLTQ1ZTAtYjZjOS0xYjUxY2NkM2IzYmMiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk3Mjk5ODYsImV4cCI6MTYyOTczMjY4Nn0._f_tSAr-cvCq7nxRh2Jhdgw27QDMEq_0j3sQVZJBAYM
 
 ### 
-POST http://localhost:3000/api/student/
+POST http://192.168.31.22:3100/api/student/
 Content-Type: application/json 
-Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiI0Y2FmMmU5My03NTZjLTRhZDAtODY3OC1kZjMyNmUyMGQ2NzIiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk2MzY3MjIsImV4cCI6MTYyOTYzOTQyMn0.xC1Lk4LirBYafwDHkcYQbm2JPOkl7BvKhbY7x7NZIy0
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiIwZjczMTA5ZC0xODJhLTQ1ZTAtYjZjOS0xYjUxY2NkM2IzYmMiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk3Mjk5ODYsImV4cCI6MTYyOTczMjY4Nn0._f_tSAr-cvCq7nxRh2Jhdgw27QDMEq_0j3sQVZJBAYM
 
 {
     "studentID": "1723456798", 
@@ -44,6 +44,6 @@ Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiI0Y2FmMmU5M
 }
 
 ### 
-GET http://localhost:3000/api/student/valid
+GET http://192.168.31.22:3100/api/student/valid
 Content-Type: application/json 
-Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiI0Y2FmMmU5My03NTZjLTRhZDAtODY3OC1kZjMyNmUyMGQ2NzIiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk2MzY3MjIsImV4cCI6MTYyOTYzOTQyMn0.xC1Lk4LirBYafwDHkcYQbm2JPOkl7BvKhbY7x7NZIy0
+Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOiIwZjczMTA5ZC0xODJhLTQ1ZTAtYjZjOS0xYjUxY2NkM2IzYmMiLCJlbWFpbCI6InNhbWl1ci5wcmFwb25AZG90ZG90LmJhIiwidHlwZSI6InN0dWRlbnQiLCJpYXQiOjE2Mjk3Mjk5ODYsImV4cCI6MTYyOTczMjY4Nn0._f_tSAr-cvCq7nxRh2Jhdgw27QDMEq_0j3sQVZJBAYM