Google app engine launcher: Invalid username or password

Question

I've download google app engine (python) for windows and install it. Then I went to console.developers.google.com/project and create new project. After that, I launched google app engine launcher, create new application and named it as project I have recently create. I click on deploy and constantly getting this error:

  03:35 PM Application: udacity-hello-pozdrav; version: 1
03:35 PM Host: appengine.google.com
 03:35 PM 
Starting update of app: udacity-hello-pozdrav, version: 1
03:35 PM Getting current resource limits.
Password for t******.****@gmail.com: Invalid username or password.
2014-09-06 15:35:56,690 ERROR appcfg.py:2411 An error occurred processing file '': HTTP Error     401: Unauthorized. Aborting. 
  Error 401: --- begin server output ---
Must authenticate first.
  --- end server output ---
2014-09-06 15:35:56 (Process exited with code 1)

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I've read about appcfg.py but when I enter it in cmd, It says that it's not recognized.

Answer 1

Would be much better if you will use appcfg.py with --oauth2 flag. Like appcfg.py --oauth2 update /path/to/your/app. For the first time you will see the browser window where you'll need to allow access to your account. Then you can deploy without entering any credentials and without confirmations. This will work even with 2-step authentication turned on.

Answer 2

The "Invalid username or password" error is due to Google security protection. To overcome this error message and be able to deploy from the Launcher, go to your Google Account Settings, then enable "Access for Less Secure Apps" under Security Check Up.