Program fails to get old tweets when username is changed

[tolgaozturkk]

Hello,

When the following applies in the order, program can't get all tweets, but no error.
1- user changed its username X to Y. Now, that user's all tweets has username Y in its twitter page, even the previous ones.
2- run program for username Y.
You don't get the previous tweets when user had username X, even though twitter shows that tweets has username Y.

Indeed, when you do advanced search in twitter, it doesn't show the previous tweets that has tweeted with previous username, that's why this program can't get that tweets. So this is actually twitter's problem, not this program's.
But there might be many missing tweets by using the program if you search for username, its risky. Is there anyone else solved the problem with this program?

Searching with userId might be a solution by using url "https://twitter.com/i/user/", but thats only an idea, I didn't implement it