fix autologin on fail

src/app/auth/auth.guard.ts

@@ -78,6 +78,7 @@ export class AuthenticatedGuard implements CanActivate {
             return true;
         }).catch(function (error) {
             if (error instanceof RequestError && (error as RequestError).getResponse().status == 401) {
+                localStorage.removeItem("bstlboard.autologin");
                 return that.router.navigateByUrl(that.router.parseUrl('/login?target=' + encodeURIComponent(state.url)), { skipLocationChange: true, replaceUrl: true });
             }