```console
$ teller show
[new (dotenv)]: DELETE_ME = tr***
[new (dotenv)]: EMPTY = tr***
$ teller delete --providers new --map-id one DELETE_ME
$ teller show
[new (dotenv)]: EMPTY = tr***
$ teller delete --providers new --map-id one
$ teller show
? 1
Error: NOT FOUND "new.env": file is empty
Location:
[..]
```