Output:
All users:
User{name='Franklin', id=123, level=1}
User{name='Sanchez', id=125, level=1}
User{name='Sanchez', id=124, level=2}
User{name='Sidorov', id=126, level=2}
===================================================
User to be edited:
User{name='Sidorov', id=126, level=2}
===================================================
All users:
User{name='Franklin', id=123, level=1}
User{name='Sanchez', id=125, level=1}
User{name='Sidorov', id=126, level=2}
===================================================
All deleted users:
User{name='Sanchez (deleted)', id=124, level=2}
===================================================