diff --git a/database_interaction.py b/database_interaction.py
index cd125a3..14c40e2 100644
--- a/database_interaction.py
+++ b/database_interaction.py
@@ -1,6 +1,6 @@
 import sqlite3
 class Database():
-    def __init__(self, path):
+    def __init__(self, path: str) -> None:
         self.conn = sqlite3.connect(path)
         self.cur = self.conn.cursor()
         self.cur.execute('CREATE TABLE IF NOT EXISTS users (id INTEGER, telegram_id NUMERIC NOT NULL UNIQUE, PRIMARY KEY(id))')
@@ -8,12 +8,9 @@ class Database():
         self.cur.execute('CREATE TABLE IF NOT EXISTS subscribes (user_id INTEGER, feed_id INTEGER, FOREIGN KEY(user_id) REFERENCES users(id), FOREIGN KEY(feed_id) REFERENCES feeds(id))')
         self.cur.execute('CREATE TABLE IF NOT EXISTS feeds_last_items (feed_id INTEGER, link TEXT NOT NULL UNIQUE, title TEXT, description TEXT, date NUMERIC, FOREIGN KEY(feed_id) REFERENCES feeds(id))')
 
-    def add_user(self, telegram_id):
-        try:
-            self.cur.execute('INSERT INTO users (telegram_id) VALUES (:telegram_id)', {'telegram_id': telegram_id})
-        except sqlite3.IntegrityError:
-            return 1
-        self.conn.commit()
+    def add_user(self, telegram_id: str) -> int:
+        self.cur.execute('INSERT INTO users (telegram_id) VALUES (:telegram_id)', {'telegram_id': telegram_id})
+        return self.cur.lastrowid
 
     def add_rss_feed():
         pass