diff --git a/backend/src/main/java/com/edufocus/edufocus/registration/controller/RegistrationController.java b/backend/src/main/java/com/edufocus/edufocus/registration/controller/RegistrationController.java
index fc6e67d..2534d69 100644
--- a/backend/src/main/java/com/edufocus/edufocus/registration/controller/RegistrationController.java
+++ b/backend/src/main/java/com/edufocus/edufocus/registration/controller/RegistrationController.java
@@ -2,6 +2,8 @@ package com.edufocus.edufocus.registration.controller;
 
 import com.edufocus.edufocus.registration.entity.Registration;
 import com.edufocus.edufocus.registration.service.RegistrationService;
+import com.edufocus.edufocus.user.util.JWTUtil;
+import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -10,29 +12,30 @@ import org.springframework.web.bind.annotation.*;
 @RestController
 @RequestMapping("/registration")
 @Slf4j
+@RequiredArgsConstructor
 public class RegistrationController {
 
     private final RegistrationService registrationServiceImpl;
 
-    public RegistrationController(RegistrationService registrationServiceImpl) {
-        this.registrationServiceImpl = registrationServiceImpl;
-    }
+    private final JWTUtil jwtUtil;
 
     @PostMapping
-    public ResponseEntity<?> register(@RequestBody Registration registration) {
-        registrationServiceImpl.createRegistration(registration);
+    public ResponseEntity<?> register(@RequestHeader("Authorization") String accessToken, @RequestBody long lectureId) {
+        Long userId = Long.parseLong(jwtUtil.getUserId(accessToken));
+
+        registrationServiceImpl.createRegistration(userId, lectureId);
 
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
-    @PatchMapping("/registrationId/{registrationId}")
+    @PutMapping("/{registrationId}")
     public ResponseEntity<?> acceptRigistration(@PathVariable long registrationId) {
         registrationServiceImpl.acceptRegistration(registrationId);
 
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
-    @DeleteMapping("/registrationId/{registrationId}")
+    @DeleteMapping("/{registrationId}")
     public ResponseEntity<?> deleteRigistration(@PathVariable long registrationId) {
         registrationServiceImpl.deleteRegistration(registrationId);
 
diff --git a/backend/src/main/java/com/edufocus/edufocus/registration/entity/Registration.java b/backend/src/main/java/com/edufocus/edufocus/registration/entity/Registration.java
index 7e1cce6..4a81aba 100644
--- a/backend/src/main/java/com/edufocus/edufocus/registration/entity/Registration.java
+++ b/backend/src/main/java/com/edufocus/edufocus/registration/entity/Registration.java
@@ -3,12 +3,14 @@ package com.edufocus.edufocus.registration.entity;
 import com.edufocus.edufocus.lecture.entity.Lecture;
 import com.edufocus.edufocus.user.model.entity.User;
 import jakarta.persistence.*;
-import lombok.Getter;
-import lombok.Setter;
+import lombok.*;
 
 @Entity
 @Getter
 @Setter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
 public class Registration {
 
     @Id
diff --git a/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationService.java b/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationService.java
index fcaac94..4553408 100644
--- a/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationService.java
+++ b/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationService.java
@@ -6,7 +6,7 @@ import org.springframework.stereotype.Service;
 @Service
 public interface RegistrationService {
 
-    void createRegistration(Registration registration);
+    void createRegistration(long userId, long registrationId);
 
     void acceptRegistration(long RegistrationId);
 
diff --git a/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationServiceImpl.java b/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationServiceImpl.java
index 6eadce6..507e084 100644
--- a/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationServiceImpl.java
+++ b/backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationServiceImpl.java
@@ -1,8 +1,10 @@
 package com.edufocus.edufocus.registration.service;
 
+import com.edufocus.edufocus.lecture.repository.LectureRepository;
 import com.edufocus.edufocus.registration.entity.Registration;
 import com.edufocus.edufocus.registration.entity.RegistrationStatus;
 import com.edufocus.edufocus.registration.repository.RegistrationRepository;
+import com.edufocus.edufocus.user.model.repository.UserRepository;
 import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -15,21 +17,26 @@ import java.util.Optional;
 public class RegistrationServiceImpl implements RegistrationService {
 
     private final RegistrationRepository registrationRepository;
+    private final UserRepository userRepository;
+    private final LectureRepository lectureRepository;
 
     @Override
-    public void createRegistration(Registration registration) {
+    public void createRegistration(long userId, long lectureId) {
+        Registration registration = new Registration().builder()
+                .user(userRepository.getReferenceById(userId))
+                .lecture(lectureRepository.getReferenceById(lectureId))
+                .status(RegistrationStatus.WAITING)
+                .build();
+
         registrationRepository.save(registration);
     }
 
     @Override
     public void acceptRegistration(long registrationId) {
-        Optional<Registration> registration = registrationRepository.findById(registrationId);
+        Registration registration = registrationRepository.findById(registrationId).get();
 
-        if (registration.isPresent()) {
-            Registration reg = registration.get();
-            reg.setStatus(RegistrationStatus.valueOf("ACCEPTED"));
-            registrationRepository.save(reg);
-        }
+        registration.setStatus(RegistrationStatus.valueOf("ACCEPTED"));
+        registrationRepository.save(registration);
     }
 
     @Override
@@ -39,8 +46,8 @@ public class RegistrationServiceImpl implements RegistrationService {
 
     @Override
     public boolean isAcceptedRegistration(long registrationId) {
-        Optional<Registration> registration = registrationRepository.findById(registrationId);
+        Registration registration = registrationRepository.findById(registrationId).get();
 
-        return registration.isPresent() && registration.get().getStatus().equals("ACCEPTED");
+        return registration.getStatus().equals("ACCEPTED");
     }
 }