Help about 'co-authors' please!

Hi everyone!
I'm new here (1month approx.) and I would like people to explain me how it work. Like having two authors for one story. How to do it? Will both authors able to change it?...
Thanks already!
xI_am_your_shadowx

Basically, both authors have the ability to add chapters to a story or add and change things within the story. It's basically like having a regular story but it appears under both authors' stories on their profiles and both are able to make changes and add chapters.

@thatscalledyes
Thanks! :)

@xI_am_your_shadowx
Do you need a co-author? If so, I'm available.

@Andy'sSoul
No it was'nt for me this time :)
I'm about being someone else's co-author, so I wanted to know a bit more.
In any case thank you very much!

@xI_am_your_shadowx
Your welcome. And if you ever need one, I'm always here! ;)

Thanks! I really like people on this site! You're all amazing!

@xI_am_your_shadowx
You know, except some people.

@Andy'sSoul
Ohw I know, but I prefer to focus on the positive, here the biiiig majority of people aren't bad. So I'll focus on them and forget about the bullies/troll. Like that for me this site will be in the 'good' part of life. I must do that, always focus on the positive part of life! Or else I'll start to dig my grave myself xD

@xI_am_your_shadowx
I never thought of it like that. I like your POV.

@Andy'sSoul
Like that you'll keep going easier! :)

@xI_am_your_shadowx
Thanks doll! XD

@Andy'sSoul
HAHAHAHA! It's not me on my avatar!! I'm not looking like that at all... Anyway, thanks for the support :)

@xI_am_your_shadowx
Always! That's why I'm here

@Andy'sSoul
I'm looking for a co author on my story. You've read the first chapter to my story already. So if you are interested, I'm looking for a co author