neptune-export/src/main/java/com/amazonaws/services/neptune/cluster/NeptuneClusterMetadata.java
neptune-gremlin-client/gremlin-client/src/main/java/software/amazon/neptune/cluster/GetEndpointsFromNeptuneManagementApi.java

neptune-export/src/main/java/com/amazonaws/services/neptune/util/EnvironmentVariableUtils.java
neptune-gremlin-client/gremlin-client/src/main/java/software/amazon/utils/EnvironmentVariableUtils.java