Hello, please don’t tack on #HelpMeToos onto other’s topics…particularly old ones.
I have moved your issue into your own topic.
Based on your screenshot (we prefer copy/paste for textual data), aside from what looks like you are using example@gmail.com in the gmail initialization, and unless you somehow masked out your serial monitor output… is your email really xxxxxx@gmail.com 
Even if all that is somehow correct… it also clearly states that username and password not accepted 
So, double/triple check all your settings and confirm that you are using basic gmail setup, no 2nd verification etc.