How does cowriting in praxis work

Hi, please you who already do have a writing partner. how do you do it?

Because the episode uses to logging email, I of the case do not want to give my email login to my writing partner… I created new google account and new episode account… which we can share…but the episode still logs me in my main account…It is so frustrating…

So I wonder do you use one account or you have solved this differently?