Can't find a way to link my apps to Ionic account


The first time I install and try Ionic,
I remember that the Terminal asked me for to signin or not with a login/pwd of a Ionic account. I said “no”.

Now I’m asking what a signin gives?
And how to signin through Terminal after having saying “no” the first time?

Here is the solution:

$ cd [project] 
$ ionic login 
$ ionic upload