Create Finely Grained Access Token

At https://github.com/settings/personal-access-tokens/new:

1. Token name: set something descriptive.
2. Expiration: set the token to expire no earlier or later than necessary.
3. Description: elaborate on the function of the token.
4. Resource owner: berkeley-dsep-infra
5. Repository access: Only selected repositories > datahub
6. Permissions: Contents > Access: Read and write