login endpont

backend/auth.py

@@ -16,4 +16,23 @@ def create_user(username, password):
         (username, password_hash)
     )
 
-    return user_id
+    return user_id
+
+def verify_user(username, password):
+    from database import fetch_one
+
+    user = fetch_one(
+        "SELECT * FROM users WHERE username = ?",
+        (username,)
+    )
+
+    if not user:
+        return None
+
+    if bcrypt.checkpw(
+        password.encode(),
+        user["password_hash"].encode()
+    ):
+        return user["id"]
+
+    return None