Function queryUsernameExists

Returns Promise<
    | {
        biz: boolean;
        bizInfo?: {
            verifiedName?: {
                isApi: boolean;
                level: string;
                name: string;
                privacyMode: any;
                serial: string;
            };
        };
        isUsernameSearch: true;
        username?: string;
        wasUpdated: boolean;
        wid: Wid;
    }
    | { isUsernameSearch: true; keyRequired: true; username?: string }
    | null,
>