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

@param externalUserId
       The Amazon Chime SDK external user ID. An idempotency token. Links the attendee to an identity managed by
       a builder application.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-chime/src/main/java/com/amazonaws/services/chime/model/CreateAttendeeRequest.java