docs: Add entry for oa token (#520)

README.md

@@ -161,6 +161,13 @@ This is useful, for example, when downloading from `s3://data.openaddresses.io`,
 as they require the requester to pay for data transfer.
 You can then use the following option: `--request-payer`
 
+### `imports.openaddresses.token`
+* Required: no
+* Default: Shared token for the pelias project
+
+Since openaddresses moved from [results.openaddresses.io](https://results.openaddresses.io) to [batch.openaddresses.org](https://batch.openaddresses.org), you need a token to access the data. There is a default shared token for the Pelias project, but if you want to use it seriously, create your own account and token on [batch.openaddresses.org. ](https://batch.openaddresses.org) to avoid possible throttling/bandwidth limit or (temporary) suspension.
+
+
 ## Parallel Importing
 
 Because OpenAddresses consists of many small files, this importer can be configured to run several instances in parallel that coordinate to import all the data.