public String getExternalUserId() {
        return this.externalUserId;
    }
<p>
The Amazon Chime SDK external user ID. An idempotency token. Links the attendee to an identity managed by a
builder application.
</p>

@return The Amazon Chime SDK external user ID. An idempotency token. Links the attendee to an identity managed by
        a builder application.
aws-java-sdk-chime/src/main/java/com/amazonaws/services/chime/model/CreateAttendeeRequest.java