diff --git a/back/src/main/java/be/naaturel/letsmeet/core/helpers/TokenGenerator.java b/back/src/main/java/be/naaturel/letsmeet/core/helpers/TokenGenerator.java
new file mode 100644
index 0000000..2c5d2d7
--- /dev/null
+++ b/back/src/main/java/be/naaturel/letsmeet/core/helpers/TokenGenerator.java
@@ -0,0 +1,14 @@
+package be.naaturel.letsmeet.core.helpers;
+
+import java.util.UUID;
+
+public class TokenGenerator {
+
+
+    private static int length = 6;
+
+    public static String generate(){
+        return UUID.randomUUID().toString().replace("-", "").substring(0, length);
+    }
+
+}
diff --git a/back/src/main/java/be/naaturel/letsmeet/models/Event.java b/back/src/main/java/be/naaturel/letsmeet/core/models/Event.java
similarity index 93%
rename from back/src/main/java/be/naaturel/letsmeet/models/Event.java
rename to back/src/main/java/be/naaturel/letsmeet/core/models/Event.java
index b75a752..47af935 100644
--- a/back/src/main/java/be/naaturel/letsmeet/models/Event.java
+++ b/back/src/main/java/be/naaturel/letsmeet/core/models/Event.java
@@ -1,4 +1,4 @@
-package be.naaturel.letsmeet.models;
+package be.naaturel.letsmeet.core.models;
 
 import java.util.*;
 
diff --git a/back/src/main/java/be/naaturel/letsmeet/models/EventDate.java b/back/src/main/java/be/naaturel/letsmeet/core/models/EventDate.java
similarity index 84%
rename from back/src/main/java/be/naaturel/letsmeet/models/EventDate.java
rename to back/src/main/java/be/naaturel/letsmeet/core/models/EventDate.java
index d222de9..13a26c1 100644
--- a/back/src/main/java/be/naaturel/letsmeet/models/EventDate.java
+++ b/back/src/main/java/be/naaturel/letsmeet/core/models/EventDate.java
@@ -1,4 +1,4 @@
-package be.naaturel.letsmeet.models;
+package be.naaturel.letsmeet.core.models;
 
 import java.util.Objects;
 
diff --git a/back/src/main/java/be/naaturel/letsmeet/models/Participant.java b/back/src/main/java/be/naaturel/letsmeet/core/models/Participant.java
similarity index 95%
rename from back/src/main/java/be/naaturel/letsmeet/models/Participant.java
rename to back/src/main/java/be/naaturel/letsmeet/core/models/Participant.java
index cbec429..2754d4a 100644
--- a/back/src/main/java/be/naaturel/letsmeet/models/Participant.java
+++ b/back/src/main/java/be/naaturel/letsmeet/core/models/Participant.java
@@ -1,4 +1,4 @@
-package be.naaturel.letsmeet.models;
+package be.naaturel.letsmeet.core.models;
 
 import java.util.HashSet;
 import java.util.Objects;
diff --git a/back/src/main/java/be/naaturel/letsmeet/dto/database/EventDateEntity.java b/back/src/main/java/be/naaturel/letsmeet/dto/database/EventDateEntity.java
index eba91b4..87de477 100644
--- a/back/src/main/java/be/naaturel/letsmeet/dto/database/EventDateEntity.java
+++ b/back/src/main/java/be/naaturel/letsmeet/dto/database/EventDateEntity.java
@@ -1,6 +1,5 @@
 package be.naaturel.letsmeet.dto.database;
 
-import be.naaturel.letsmeet.models.EventDate;
 import jakarta.persistence.*;
 
 import java.util.Objects;
diff --git a/back/src/main/java/be/naaturel/letsmeet/dto/database/EventEntity.java b/back/src/main/java/be/naaturel/letsmeet/dto/database/EventEntity.java
index f04f3da..6ce0924 100644
--- a/back/src/main/java/be/naaturel/letsmeet/dto/database/EventEntity.java
+++ b/back/src/main/java/be/naaturel/letsmeet/dto/database/EventEntity.java
@@ -1,7 +1,5 @@
 package be.naaturel.letsmeet.dto.database;
 
-import be.naaturel.letsmeet.models.EventDate;
-import be.naaturel.letsmeet.models.Participant;
 import jakarta.persistence.*;
 
 import java.util.*;
@@ -16,6 +14,9 @@ public class EventEntity {
     @Column
     public String name;
 
+    @Column(unique = true)
+    public String token;
+
     @Column
     @OneToMany(targetEntity=EventDateEntity.class, cascade=CascadeType.ALL, mappedBy="event")
     public Set<EventDateEntity> dates;
diff --git a/back/src/main/java/be/naaturel/letsmeet/dto/database/factories/DatabasePropsFactory.java b/back/src/main/java/be/naaturel/letsmeet/dto/database/factories/DatabasePropsFactory.java
index aadbb28..56ac345 100644
--- a/back/src/main/java/be/naaturel/letsmeet/dto/database/factories/DatabasePropsFactory.java
+++ b/back/src/main/java/be/naaturel/letsmeet/dto/database/factories/DatabasePropsFactory.java
@@ -1,5 +1,6 @@
 package be.naaturel.letsmeet.dto.database.factories;
 
+import be.naaturel.letsmeet.core.helpers.TokenGenerator;
 import be.naaturel.letsmeet.dto.database.EventDateEntity;
 import be.naaturel.letsmeet.dto.database.EventEntity;
 import be.naaturel.letsmeet.dto.database.ParticipantEntity;
@@ -13,6 +14,7 @@ public class DatabasePropsFactory {
 
         EventEntity entity = new EventEntity();
         entity.name = name;
+        entity.token = TokenGenerator.generate();
         entity.participants = participants;
         entity.dates = new HashSet<>();
         for (ParticipantEntity pe : entity.participants) {
diff --git a/back/src/main/java/be/naaturel/letsmeet/dto/httpRequest/EventDateDTO.java b/back/src/main/java/be/naaturel/letsmeet/dto/httpRequest/EventDateDTO.java
index 967c66e..9e065d1 100644
--- a/back/src/main/java/be/naaturel/letsmeet/dto/httpRequest/EventDateDTO.java
+++ b/back/src/main/java/be/naaturel/letsmeet/dto/httpRequest/EventDateDTO.java
@@ -1,7 +1,5 @@
 package be.naaturel.letsmeet.dto.httpRequest;
 
-import be.naaturel.letsmeet.models.EventDate;
-
 import java.util.Objects;
 
 public class EventDateDTO {
diff --git a/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventDateMapper.java b/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventDateMapper.java
index dd88d26..3a27bd9 100644
--- a/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventDateMapper.java
+++ b/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventDateMapper.java
@@ -3,7 +3,7 @@ package be.naaturel.letsmeet.mappers.database;
 import be.naaturel.letsmeet.dto.database.EventDateEntity;
 import be.naaturel.letsmeet.dto.database.factories.DatabasePropsFactory;
 import be.naaturel.letsmeet.mappers.Mapper;
-import be.naaturel.letsmeet.models.EventDate;
+import be.naaturel.letsmeet.core.models.EventDate;
 
 import java.util.Collection;
 import java.util.function.Supplier;
diff --git a/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventMapper.java b/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventMapper.java
index 8e7a2d4..6813546 100644
--- a/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventMapper.java
+++ b/back/src/main/java/be/naaturel/letsmeet/mappers/database/EventMapper.java
@@ -4,8 +4,8 @@ import be.naaturel.letsmeet.dto.database.EventEntity;
 import be.naaturel.letsmeet.dto.database.ParticipantEntity;
 import be.naaturel.letsmeet.dto.database.factories.DatabasePropsFactory;
 import be.naaturel.letsmeet.mappers.Mapper;
-import be.naaturel.letsmeet.models.Event;
-import be.naaturel.letsmeet.models.Participant;
+import be.naaturel.letsmeet.core.models.Event;
+import be.naaturel.letsmeet.core.models.Participant;
 
 import java.util.*;
 import java.util.function.Supplier;
diff --git a/back/src/main/java/be/naaturel/letsmeet/mappers/database/ParticipantMapper.java b/back/src/main/java/be/naaturel/letsmeet/mappers/database/ParticipantMapper.java
index 7e5b1d5..f6b2656 100644
--- a/back/src/main/java/be/naaturel/letsmeet/mappers/database/ParticipantMapper.java
+++ b/back/src/main/java/be/naaturel/letsmeet/mappers/database/ParticipantMapper.java
@@ -4,8 +4,8 @@ import be.naaturel.letsmeet.dto.database.EventDateEntity;
 import be.naaturel.letsmeet.dto.database.ParticipantEntity;
 import be.naaturel.letsmeet.dto.database.factories.DatabasePropsFactory;
 import be.naaturel.letsmeet.mappers.Mapper;
-import be.naaturel.letsmeet.models.EventDate;
-import be.naaturel.letsmeet.models.Participant;
+import be.naaturel.letsmeet.core.models.EventDate;
+import be.naaturel.letsmeet.core.models.Participant;
 
 import java.util.Collection;
 import java.util.HashSet;
diff --git a/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDTOMapper.java b/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDTOMapper.java
index ae065bb..0ca38ab 100644
--- a/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDTOMapper.java
+++ b/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDTOMapper.java
@@ -3,8 +3,8 @@ package be.naaturel.letsmeet.mappers.requests;
 import be.naaturel.letsmeet.dto.httpRequest.EventDTO;
 import be.naaturel.letsmeet.dto.httpRequest.ParticipantDTO;
 import be.naaturel.letsmeet.mappers.Mapper;
-import be.naaturel.letsmeet.models.Event;
-import be.naaturel.letsmeet.models.Participant;
+import be.naaturel.letsmeet.core.models.Event;
+import be.naaturel.letsmeet.core.models.Participant;
 
 import java.util.Collection;
 import java.util.HashSet;
diff --git a/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDateDTOMapper.java b/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDateDTOMapper.java
index 82085d5..e5168f5 100644
--- a/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDateDTOMapper.java
+++ b/back/src/main/java/be/naaturel/letsmeet/mappers/requests/EventDateDTOMapper.java
@@ -1,13 +1,10 @@
 package be.naaturel.letsmeet.mappers.requests;
 
 import be.naaturel.letsmeet.dto.httpRequest.EventDateDTO;
-import be.naaturel.letsmeet.dto.httpRequest.ParticipantDTO;
 import be.naaturel.letsmeet.mappers.Mapper;
-import be.naaturel.letsmeet.models.EventDate;
-import be.naaturel.letsmeet.models.Participant;
+import be.naaturel.letsmeet.core.models.EventDate;
 
 import java.util.Collection;
-import java.util.HashSet;
 import java.util.function.Supplier;
 
 public class EventDateDTOMapper implements Mapper<EventDate, EventDateDTO> {
diff --git a/back/src/main/java/be/naaturel/letsmeet/mappers/requests/ParticipantDTOMapper.java b/back/src/main/java/be/naaturel/letsmeet/mappers/requests/ParticipantDTOMapper.java
index 1f6586c..3763689 100644
--- a/back/src/main/java/be/naaturel/letsmeet/mappers/requests/ParticipantDTOMapper.java
+++ b/back/src/main/java/be/naaturel/letsmeet/mappers/requests/ParticipantDTOMapper.java
@@ -3,8 +3,8 @@ package be.naaturel.letsmeet.mappers.requests;
 import be.naaturel.letsmeet.dto.httpRequest.EventDateDTO;
 import be.naaturel.letsmeet.dto.httpRequest.ParticipantDTO;
 import be.naaturel.letsmeet.mappers.Mapper;
-import be.naaturel.letsmeet.models.EventDate;
-import be.naaturel.letsmeet.models.Participant;
+import be.naaturel.letsmeet.core.models.EventDate;
+import be.naaturel.letsmeet.core.models.Participant;
 
 import java.util.Collection;
 import java.util.HashSet;
diff --git a/back/src/main/java/be/naaturel/letsmeet/services/EventService.java b/back/src/main/java/be/naaturel/letsmeet/services/EventService.java
index 696531c..5031072 100644
--- a/back/src/main/java/be/naaturel/letsmeet/services/EventService.java
+++ b/back/src/main/java/be/naaturel/letsmeet/services/EventService.java
@@ -1,11 +1,10 @@
 package be.naaturel.letsmeet.services;
 
-import be.naaturel.letsmeet.dto.database.EventDateEntity;
 import be.naaturel.letsmeet.dto.database.EventEntity;
 import be.naaturel.letsmeet.dto.httpRequest.EventDTO;
 import be.naaturel.letsmeet.mappers.database.EventMapper;
 import be.naaturel.letsmeet.mappers.requests.EventDTOMapper;
-import be.naaturel.letsmeet.models.Event;
+import be.naaturel.letsmeet.core.models.Event;
 import be.naaturel.letsmeet.repositories.EventRepo;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.OptimisticLockingFailureException;
diff --git a/back/src/test/java/be/naaturel/letsmeet/mappers/DateMapperTest.java b/back/src/test/java/be/naaturel/letsmeet/mappers/DateMapperTest.java
index 3660b9b..729a6d4 100644
--- a/back/src/test/java/be/naaturel/letsmeet/mappers/DateMapperTest.java
+++ b/back/src/test/java/be/naaturel/letsmeet/mappers/DateMapperTest.java
@@ -2,7 +2,7 @@ package be.naaturel.letsmeet.mappers;
 
 import be.naaturel.letsmeet.dto.database.EventDateEntity;
 import be.naaturel.letsmeet.mappers.database.EventDateMapper;
-import be.naaturel.letsmeet.models.EventDate;
+import be.naaturel.letsmeet.core.models.EventDate;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
diff --git a/back/src/test/java/be/naaturel/letsmeet/mappers/EventMapperTest.java b/back/src/test/java/be/naaturel/letsmeet/mappers/EventMapperTest.java
index 47c34b1..8ea0bda 100644
--- a/back/src/test/java/be/naaturel/letsmeet/mappers/EventMapperTest.java
+++ b/back/src/test/java/be/naaturel/letsmeet/mappers/EventMapperTest.java
@@ -1,15 +1,5 @@
 package be.naaturel.letsmeet.mappers;
 
-import be.naaturel.letsmeet.dto.database.EventDateEntity;
-import be.naaturel.letsmeet.dto.database.EventEntity;
-import be.naaturel.letsmeet.mappers.database.EventMapper;
-import be.naaturel.letsmeet.models.EventDate;
-import be.naaturel.letsmeet.models.Event;
-import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.Test;
-
-import java.util.*;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class EventMapperTest {