fix(login): fix bugs

app.py

@@ -16,7 +16,9 @@ def login():
     username = rdata['username']
     password = rdata['password']
     if dao.valid(username, password):
-        return make_response(json.dumps({'result': 'success'})).set_cookie('jwt', jwt.generate_jwt(username))
+        response = make_response(json.dumps({'result': 'success'}))
+        response.set_cookie('jwt', jwt.generate_jwt(username))
+        return response
     else:
         return make_response(json.dumps({'result': 'fail'}))
 

dao.py

@@ -6,7 +6,7 @@ def valid(username, password):
     base_cursor = db_connection.cursor()
     password_cursor = base_cursor.execute(f'SELECT password FROM user WHERE username=="{username}";')
     db_password = password_cursor.fetchone()
-    if len(db_password != 1):
+    if db_password is None:
         return False
     if db_password[0] == password:
         return True