3d-tiles-renderer/src/three/plugins/CesiumIonAuthPlugin.d.ts

https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/specification

export class CesiumIonAuthPlugin {

	constructor( options : {
		apiToken: string,
		assetId?: string | null,
		autoRefreshToken?: boolean
	} );

}