message: fix(authentication-client): Fix storage type so it works with all supported interfaces
diff: export interface Storage {
  - getItem (key: string): Promise<any>;
  - setItem? (key: string, value: any): Promise<any>;
  - removeItem? (key: string): Promise<any>;
  + getItem (key: string): any;
  + setItem? (key: string, value: any): any;
  + removeItem? (key: string): any;
  }
  export class MemoryStorage implements Storage {
  