Improve Google oauth2 credentials method in README

[thekester]

Updates to Command and Documentation

• Corrected Error: Updated the incorrect command from:

  earthengine authenticate --force <YOUR-PROJECT-ID>

  to:

  earthengine set_project <YOUR-PROJECT-ID>

  This corrects an error in the tutorial by specifying the proper method for setting the project.

• Added Command to Check Existing Project IDs: To help users find their available projects, added the following command:

  gcloud projects list

  This command will list the existing projects, making it easier to set the correct project.

• Added Possible Errors Section: Included a new section for common errors that may occur during the tutorial:

  Possible Errors and Fixes

  • Error 1: Google Earth Engine API Not Enabled

  • Solution: Make sure to enable the Google Earth Engine API via the Google Cloud Console.

  • Error 2: API Disabled for Specific Project

  • Solution: Verify that the project you are using has Google Earth Engine API access enabled.

[thekester]

Thank you for reviewing and merging my pull request! I appreciate your support.