diff --git a/src/auth/auth.cpp b/src/auth/auth.cpp
index e52608b..feb5b84 100644
--- a/src/auth/auth.cpp
+++ b/src/auth/auth.cpp
@@ -14,30 +14,13 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(AUTH_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "no body in auth request");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, AUTH_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["username"] == nullptr) {
-                response.set_content(AUTH_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "no username in auth request");
-                return;
-            }
-            if (json_body["password"] == nullptr) {
-                response.set_content(AUTH_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "no password in auth request");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "username", response, AUTH_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "password", response, AUTH_REQUIRED_STRING);
             const std::string request_username = json_body["username"];
             const std::string request_password = json_body["password"];
-
-            std::lock_guard<std::mutex> lock(AuthService::Includes::usersfilemutex);
-            std::ifstream usersfile(USERS_FILE);
-            nlohmann::json all_users = nlohmann::json::parse(usersfile);
-            usersfile.close();
+            nlohmann::json all_users = AuthService::Includes::get_all_users_from_file();
 
             std::string userid;
             for (nlohmann::basic_json<> user : all_users) {
diff --git a/src/auth/auth.hpp b/src/auth/auth.hpp
index b5bad8d..0bc5f0c 100644
--- a/src/auth/auth.hpp
+++ b/src/auth/auth.hpp
@@ -10,6 +10,6 @@ namespace AuthService
         void auth(const httplib::Request& request, httplib::Response& response);
 
         // function for verify tokens
-        bool verify_auth(const std::string& token);
+        void verify_auth(const std::string& token, httplib::Response& response);
     }
 }
diff --git a/src/auth/verify_auth.cpp b/src/auth/verify_auth.cpp
index 7e5fdb0..06f124d 100644
--- a/src/auth/verify_auth.cpp
+++ b/src/auth/verify_auth.cpp
@@ -7,19 +7,27 @@ namespace AuthService
 {
     namespace Auth
     {
-        // function for verify tokens
-        bool verify_auth(const std::string& token)
+        void send_reject(httplib::Response& response) {
+            response.set_content(R"({"access":"reject"})", JSON_TYPE);
+            syslog(LOG_ERR, "access rejected");
+        }
+        void verify_auth(const std::string& token, httplib::Response& response)
         {
             try {
-                return JWT::verifyJWT(token, JWT_SECRET_KEY);
+                if (!JWT::verifyJWT(token, JWT_SECRET_KEY)) {
+                    send_reject(response);
+                    return;
+                }
             }
             catch (const std::system_error& e) {
                 std::cout << "Verification error: " << e.what() << std::endl;
                 syslog(LOG_ERR, "token verification error");
-                return false;
+                send_reject(response);
+                return;
             }
             catch (...) {
-                return false;
+                send_reject(response);
+                return;
             }
         }
     }
diff --git a/src/includes.hpp b/src/includes.hpp
index 28fe0b9..0df07dd 100644
--- a/src/includes.hpp
+++ b/src/includes.hpp
@@ -1,6 +1,9 @@
 #ifndef INCLUDES_HPP
 #define INCLUDES_HPP
 
+#include <json.hpp>
+#include <syslog.h>
+
 namespace AuthService
 {
     namespace Includes
@@ -16,6 +19,27 @@ namespace AuthService
 #define DELETE_USER_REQUIRED_STRING R"({"required":"[token] or if you superuser [token,userid]"})"
 #define USERS_FILE "users.json"
         static std::mutex usersfilemutex;
+        inline void check_body_empty(const httplib::Request& request, httplib::Response& response, std::string required_string) {
+            if (request.body.empty()) {
+                response.set_content(required_string, JSON_TYPE);
+                syslog(LOG_ERR, "no body in request");
+                return;
+            }
+        }
+        inline void check_body_data(nlohmann::json body, std::string data, httplib::Response& response, std::string required_string) {
+            if (body[data] == nullptr) {
+                response.set_content(required_string, JSON_TYPE);
+                syslog(LOG_ERR, "Error request");
+                return;
+            }
+        }
+        inline nlohmann::json get_all_users_from_file() {
+            std::lock_guard<std::mutex> lock(AuthService::Includes::usersfilemutex);
+            std::ifstream usersfile(USERS_FILE);
+            nlohmann::json all_users = nlohmann::json::parse(usersfile);
+            usersfile.close();
+            return all_users;
+        }
     }
 }
 #endif // INCLUDES_HPP
diff --git a/src/users/access_request.cpp b/src/users/access_request.cpp
index 8a35267..eddd500 100644
--- a/src/users/access_request.cpp
+++ b/src/users/access_request.cpp
@@ -14,23 +14,10 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "access request body is emty");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, ACCESS_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "no token in acces request");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(R"({"access":"reject"})", JSON_TYPE);
-                syslog(LOG_ERR, "access rejected");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "token", response, ACCESS_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
             response.set_content(R"({"access":"success"})", JSON_TYPE);
             syslog(LOG_INFO, "access success");
         }
diff --git a/src/users/add_user.cpp b/src/users/add_user.cpp
index c1b82a7..07a1cb9 100644
--- a/src/users/add_user.cpp
+++ b/src/users/add_user.cpp
@@ -26,38 +26,12 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(ADD_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "add user request body is empty");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, ADD_USER_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(ADD_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no token in add user request");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(STRING403, JSON_TYPE);
-                syslog(LOG_ERR, "access reject in add user request");
-                return;
-            }
-            if (json_body["username"] == nullptr) {
-                response.set_content(ADD_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no username in add user request");
-                return;
-            }
-            if (json_body["password"] == nullptr) {
-                response.set_content(ADD_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no password in add user request");
-                return;
-            }
-
+            AuthService::Includes::check_body_data(json_body, "token", response, ADD_USER_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
+            AuthService::Includes::check_body_data(json_body, "username", response, ADD_USER_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "password", response, ADD_USER_REQUIRED_STRING);
             std::string userid = JWT::get_payload(json_body["token"], JWT_SECRET_KEY)["userId"];
             if (userid.empty()) {
                 response.set_content(STRING403, JSON_TYPE);
diff --git a/src/users/change_password.cpp b/src/users/change_password.cpp
index 63a29c2..3220808 100644
--- a/src/users/change_password.cpp
+++ b/src/users/change_password.cpp
@@ -14,42 +14,13 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(
-                    CHANGE_PASSWORD_REQUIRED_STRING,
-                    JSON_TYPE
-                );
-                syslog(LOG_ERR, "body is empty in change password request");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, CHANGE_PASSWORD_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(
-                    CHANGE_PASSWORD_REQUIRED_STRING,
-                    JSON_TYPE
-                );
-                syslog(LOG_ERR, "no token in change password request");
-                return;
-            }
-            if ((json_body["userid"] == nullptr) && (json_body["old_password"] == nullptr)) {
-                response.set_content(
-                    CHANGE_PASSWORD_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no old password is change password request");
-                return;
-            }
-            if (json_body["new_password"] == nullptr) {
-                response.set_content(CHANGE_PASSWORD_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no new password in change password request");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(STRING403, JSON_TYPE);
-                syslog(LOG_ERR, "access reject in change password request");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "token", response, CHANGE_PASSWORD_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "userid", response, CHANGE_PASSWORD_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "old_password", response, CHANGE_PASSWORD_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "new_password", response, CHANGE_PASSWORD_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
 
             std::string old_password;
             const std::string new_password = json_body["new_password"];
diff --git a/src/users/change_user.cpp b/src/users/change_user.cpp
index eefab6c..a10585a 100644
--- a/src/users/change_user.cpp
+++ b/src/users/change_user.cpp
@@ -14,35 +14,12 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(
-                    CHANGE_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "change user request body is empty");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, CHANGE_USER_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(
-                    CHANGE_USER_REQUIRED_STRING,
-                    JSON_TYPE
-                );
-                syslog(LOG_ERR, "no token in change user request");
-                return;
-            }
-            if ((json_body["userid"] == nullptr) && (json_body["old_password"] == nullptr)) {
-                response.set_content(
-                    CHANGE_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no old_password in change user request");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(STRING403, JSON_TYPE);
-                syslog(LOG_ERR, "access reject in change user request");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "token", response, CHANGE_USER_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "userid", response, CHANGE_USER_REQUIRED_STRING);
+            AuthService::Includes::check_body_data(json_body, "old_password", response, CHANGE_USER_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
 
             std::string userid = JWT::get_payload(json_body["token"], JWT_SECRET_KEY)["userId"];
             if (userid.empty()) {
diff --git a/src/users/delete_user.cpp b/src/users/delete_user.cpp
index 3497bc8..b5dd596 100644
--- a/src/users/delete_user.cpp
+++ b/src/users/delete_user.cpp
@@ -14,27 +14,10 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(
-                    DELETE_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "delete user request body is empty");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, DELETE_USER_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(
-                    DELETE_USER_REQUIRED_STRING,
-                    JSON_TYPE);
-                syslog(LOG_ERR, "no token in delete user request");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(STRING403, JSON_TYPE);
-                syslog(LOG_ERR, "access reject in delete user request");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "token", response, DELETE_USER_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
 
             std::string userid = JWT::get_payload(json_body["token"], JWT_SECRET_KEY)["userId"];
             if (userid.empty()) {
diff --git a/src/users/get_all_users.cpp b/src/users/get_all_users.cpp
index 8195b53..c8ad48c 100644
--- a/src/users/get_all_users.cpp
+++ b/src/users/get_all_users.cpp
@@ -14,33 +14,17 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "get all users request body is empty");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, ACCESS_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "no token in get all users");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(STRING403, JSON_TYPE);
-                syslog(LOG_ERR, "access reject in get all user request");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "token", response, ACCESS_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
             std::string userid = JWT::get_payload(json_body["token"], JWT_SECRET_KEY)["userId"];
             if (userid.empty()) {
                 response.set_content(STRING403, JSON_TYPE);
                 syslog(LOG_ERR, "access reject in get all user request");
                 return;
             }
-            std::lock_guard<std::mutex> lock(AuthService::Includes::usersfilemutex);
-            std::ifstream usersfile(USERS_FILE);
-            nlohmann::json all_users = nlohmann::json::parse(usersfile);
-            usersfile.close();
+            nlohmann::json all_users = AuthService::Includes::get_all_users_from_file();
             nlohmann::json response_user_data = nullptr;
             for (nlohmann::json& user : all_users) {
                 if (user["id"] == userid) {
diff --git a/src/users/get_user.cpp b/src/users/get_user.cpp
index eb8939c..820b952 100644
--- a/src/users/get_user.cpp
+++ b/src/users/get_user.cpp
@@ -14,33 +14,17 @@ namespace AuthService
         {
             std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
             response.set_header("Access-Control-Allow-Origin", "*");
-            if (request.body.empty()) {
-                response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "get user request body is empty");
-                return;
-            }
+            AuthService::Includes::check_body_empty(request, response, ACCESS_REQUIRED_STRING);
             nlohmann::json json_body = nlohmann::json::parse(request.body);
-
-            if (json_body["token"] == nullptr) {
-                response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
-                syslog(LOG_ERR, "no token in get user request");
-                return;
-            }
-            if (!AuthService::Auth::verify_auth(json_body["token"])) {
-                response.set_content(STRING403, JSON_TYPE);
-                syslog(LOG_ERR, "access reject in get user request");
-                return;
-            }
+            AuthService::Includes::check_body_data(json_body, "token", response, ACCESS_REQUIRED_STRING);
+            AuthService::Auth::verify_auth(json_body["token"], response);
             std::string userid = JWT::get_payload(json_body["token"], JWT_SECRET_KEY)["userId"];
             if (userid.empty()) {
                 response.set_content(STRING403, JSON_TYPE);
                 syslog(LOG_ERR, "access reject in get user request");
                 return;
             }
-            std::lock_guard<std::mutex> lock(AuthService::Includes::usersfilemutex);
-            std::ifstream usersfile(USERS_FILE);
-            nlohmann::json all_users = nlohmann::json::parse(usersfile);
-            usersfile.close();
+            nlohmann::json all_users = AuthService::Includes::get_all_users_from_file();
             nlohmann::json response_user_data = nullptr;
             for (nlohmann::json& user : all_users) {
                 if (user["id"] == userid) {