Hi there.
I have synchronized in the Defold Editor but it is not update in SourceTree.
So I tried to pull the project from SourceTree but I could not log in.
What password do I need to enter here? (I signed up for a Google account, and my Google account password was not right there.)
Login to the dashboard on www.defold.com
When you are logged in click on “Settings”
And then click on the “Generate access token” button
This will give you a token that is your password to access the repository. Save this access token somewhere safe, if you need to use it in the future.
Perfect! Thank you for your quick answer! 
