Both the Develocity Gradle plugin and the official build-validation-scripts use access keys defined in either

• env variable DEVELOCITY_ACCESS_KEY, or
• file $GRADLE_USER_HOME/develocity/keys.properties

Both are formatted to support multiple Develocity hosts:

ge.apache.org=<key1>
ge.junit.org=<key1>

Supporting that could simplify configuration for users of this library, which probably also use the plugin and/or the validation scripts. Currently, they're required to set both DEVELOCITY_API_TOKEN (for this library) and DEVELOCITY_ACCESS_KEY, which is possibly redundant.