bitwarden-browser/src/abstractions/user.service.ts

export abstract class UserService {
    userId: string;
    email: string;
    stamp: string;

    setUserIdAndEmail: (userId: string, email: string) => Promise<any>;
    setSecurityStamp: (stamp: string) => Promise<any>;
    getUserId: () => Promise<string>;
    getEmail: () => Promise<string>;
    getSecurityStamp: () => Promise<string>;
    clear: () => Promise<any>;
    isAuthenticated: () => Promise<boolean>;
}