diff --git a/backend/data/sqlite-database.db b/backend/data/sqlite-database.db
index 42aca8a..e06b1f6 100644
Binary files a/backend/data/sqlite-database.db and b/backend/data/sqlite-database.db differ
diff --git a/backend/src/rest_api.py b/backend/src/rest_api.py
index 546c49d..593a22b 100644
--- a/backend/src/rest_api.py
+++ b/backend/src/rest_api.py
@@ -56,6 +56,7 @@ def register_leader() -> flask.Response:
             -1,
             mail=mail,
             team_id=team_id,
+            team_leader=1,
             **request_data,
         ))
         user_id = utils.UserHandler.get_user_by_mail(mail).user_id
@@ -117,11 +118,13 @@ def register() -> flask.Response:
     except KeyError:
         return flask.Response("Not logged in", 428)
     try:
+        print(utils.UserHandler.get_user_by_id(user_id))
         team_id = utils.UserHandler.get_user_by_id(user_id).team_id
         utils.UserHandler.create_user(utils.User(
             -1,
             secrets.token_urlsafe(20),
             team_id=team_id,
+            team_leader=0,
             **flask.request.form,
         ))
     except TypeError:
diff --git a/backend/src/utils/user.py b/backend/src/utils/user.py
index 70f1f89..f1fecc4 100644
--- a/backend/src/utils/user.py
+++ b/backend/src/utils/user.py
@@ -20,6 +20,7 @@ class User:
     phone_number: int
     name: str
     team_id: int
+    team_leader: int
 
     def __init__(
             self,
@@ -36,6 +37,7 @@ class User:
             pin_code: int|str,
             phone_number: int|str,
             name: str,
+            team_leader: bool|int|str,
             team_id: int|str,
     ) -> None:
         self.user_id: int = int(user_id)
@@ -52,6 +54,7 @@ class User:
         self.phone_number: int = int(phone_number)
         self.name = name
         self.team_id = int(team_id)
+        self.team_leader = int(team_leader)
 
     def to_dict(self) -> dict:
         the_dict = vars(self)
@@ -67,7 +70,7 @@ class UserHandler:
         cls,
         user: User
     ) -> None:
-        assert len(utils.TeamHandler.get_team_members(user.team_id)) <= 4
+        assert len(utils.TeamHandler.get_team_members(user.team_id)) < 4
         salt = bcrypt.gensalt()
         encrypted_password = bcrypt.hashpw(user.password.encode("utf-8"), salt)
         cls.__cursor.execute(
@@ -88,7 +91,7 @@ class UserHandler:
                     team_id,
                     team_leader
                 )
-                VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 1)
+                VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
                 """,
     (
                     encrypted_password,
@@ -104,6 +107,7 @@ class UserHandler:
                     user.phone_number,
                     user.name,
                     user.team_id,
+                    user.team_leader,
                 )
         )
         cls.__connection.commit()
@@ -134,7 +138,8 @@ class UserHandler:
                 user[10],
                 user[11],
                 user[12],
-                user[13]
+                user[13],
+                user[14],
         )
     
     @classmethod
@@ -163,7 +168,8 @@ class UserHandler:
                 user[10],
                 user[11],
                 user[12],
-                user[13]
+                user[13],
+                user[14],
         )
 
     @classmethod