Неправильное использование табуляции

Выдает ошибку:

TabError: inconsistent use of tabs and spaces in indentation

Все проверял, ничего не помогло, ошибку выдает возле def get_avard()

import sqlite3

class SQLighter:

    def __init__(self, database):
        self.connection = sqlite3.connect(database)
        self.cursor = self.connection.cursor()

    def add_idea(self, user_id, idea, username):
        with self.connection:
            return self.cursor.execute("INSERT INTO `ideas` (`user_id`, `idea`, `username`) VALUES(?,?,?)", (user_id,idea,username))

    def add_avard(self, avard):
        with self.connection:
            return self.cursor.execute("INSERT INTO `avards` (avard) VALUES(?)", (avard))

    def get_user(self, jid):
        with self.connection:
            return self.cursor.execute("SELECT * FROM `ideas` WHERE `jid` = ?", (jid)).fetchall()

    def get_avard(self, jid):
        with self.connection:
            return self.cursor.execute("SELECT * FROM `avards` WHERE `jid` = ?", (jid)).fetchall()

    def close(self):
        self.connection.close()