This is a violation of forum guidelines and shouldnt be allowed.
Either, for sending person and accepting person.
Plugin authors shouldnt not accept your offer to login to your site. Even test site.
never ask for credentials on these forums.
https://www.ads-software.com/support/guidelines/#the-bad-stuff
Also, please read this article on the nuances of such a request.
Now for the why: The internet is a wonderful place full of very nice people and a few very bad ones. I’m sure everyone here is very nice however, by giving some ones keys to your house you are trusting they wont steal anything. Likewise the person who takes the keys is now responsible for the house FOREVER.
If something was to go wrong, then you the author may well legally become liable for damages, which they would not normally have been as their software is provided without warranty.
Please be aware that repeatedly asking for credentials will result in us escalating this to the plugins team.
It’s never necessary to do that. Here’s why.
There are many ways to get information you need and accessing the user’s site is not one of them. That’s going too far.
You get the idea.