What does (name) でした mean?


During one of Yui's concerts I heard her say,

> ありがとうございました。Yuiでした。

<https://clyp.it/0lsklv1i>

What does it mean here?

I only know りんごでした = it **was** an apple.  
So it doesn't make sense for her to be saying I **was** Yui.




It wouldn't be odd if, in English, a singer ended a concert with 'Thank you
all so much for attending. This **has been** Yui, and I'll see you again next
time,' would it?




It wouldn't be odd if, in English, a singer ended a concert with 'Thank you
all so much for attending. This **has been** Yui, and I'll see you again next
time,' would it?

