Fix access to Google Earth Engine service account

[saurabhlevin]

The following datasets are accessed through google earth engine:

• SENTINEL
• NASADEM
• GCN250

In order to automate scraper scripts, a google earth engine service account is required. This account needs to be associated with an organisation, and the current CDL account is not accessible.

[saurabhlevin]

GEE can be accessed for free, but is a proprietary platform - we need to confirm the following:

• whether data sourced from there will be DPG compliant (note: it can be accessed for free, as documented here by @steve341
• Whether dataset licenses allow us to reshare them on our platform in a DPG - compliant manner