diff --git a/backend/backend_api/migrations/0056_presentationparticipation_password_and_more.py b/backend/backend_api/migrations/0056_presentationparticipation_password_and_more.py
new file mode 100644
index 0000000..b644e0e
--- /dev/null
+++ b/backend/backend_api/migrations/0056_presentationparticipation_password_and_more.py
@@ -0,0 +1,28 @@
+# Generated by Django 4.2.4 on 2023-12-05 19:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('backend_api', '0055_alter_discount_code'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='presentationparticipation',
+            name='password',
+            field=models.CharField(default='KlWfmELW5ixsZmqh', max_length=255),
+        ),
+        migrations.AddField(
+            model_name='workshopregistration',
+            name='password',
+            field=models.CharField(default='g0WmA7rXbIxm5OVJ', max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='discount',
+            name='code',
+            field=models.CharField(default='4Hjyva31c9rSMamSNQkqWz1lrMa0kr1E', max_length=32, unique=True),
+        ),
+    ]
diff --git a/backend/backend_api/models.py b/backend/backend_api/models.py
index 3b29ed5..d14ed6f 100644
--- a/backend/backend_api/models.py
+++ b/backend/backend_api/models.py
@@ -287,26 +287,38 @@ class StatusChoices(models.IntegerChoices):
         AWAITING_PAYMENT = 1, _('Waiting for payment')
         PURCHASED = 2, _('Purchase confirmed')
 
+    _PASSWORD_LENGTH = 16
     workshop = models.ForeignKey(Workshop, on_delete=models.CASCADE)
     user = models.ForeignKey(User, on_delete=models.CASCADE)
     status = models.IntegerField(choices=StatusChoices.choices, default=StatusChoices.AWAITING_PAYMENT)
+    password = models.CharField(max_length=SMALL_MAX_LENGTH, default=create_random_string(_PASSWORD_LENGTH))
 
     class Meta:
         unique_together = ('workshop', 'user',)
 
+    @property
+    def username(self) -> str:
+        return f'{self.user.account.email.split("@")[0]}_workshop_{self.workshop.id}'
+
 
 class PresentationParticipation(models.Model):
     class StatusChoices(models.IntegerChoices):
         AWAITING_PAYMENT = 1, _('Waiting for payment')
         PURCHASED = 2, _('Purchase confirmed')
 
+    _PASSWORD_LENGTH = 16
     presentation = models.ForeignKey(Presentation, on_delete=models.CASCADE)
     user = models.ForeignKey(User, on_delete=models.CASCADE)
     status = models.IntegerField(choices=StatusChoices.choices, default=StatusChoices.AWAITING_PAYMENT)
+    password = models.CharField(max_length=SMALL_MAX_LENGTH, default=create_random_string(_PASSWORD_LENGTH))
 
     class Meta:
         unique_together = ('presentation', 'user',)
 
+    @property
+    def username(self) -> str:
+        return f'{self.user.account.email.split("@")[0]}_presentation_{self.presentation.id}'
+
 
 class Misc(models.Model):
     name = models.CharField(max_length=SMALL_MAX_LENGTH, primary_key=True)