misleading username in example

Edit Subject

please change python stmp example at http://docs.sendgrid.com/documentatio...
it shows:

username = 'yourlogin@sendgrid.net'

this is misleading: I was trying to use my own login with @sendgrid.net appended when in fact only my sendgrid.net login is needed.

Change it to something like

username = 'your sendgrid.net login'