error in return value of canActivated guard

Question

i write below code as my main page guard that use checkTokenValidation() to valid authentication token from user but my IDE show this error :A function whose declar

Answer 1

By subscribing you are returning a Subscription instead of an Observable. You should map to the desired values and return an Observable:

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable | Promise | boolean {
    return this.authService.checkTokenValidation().pipe(
      map( (data) => {
       if (data['ok']) {
         this.router.navigate(['/overview']);
         return false;
       } else {
         return true;
       }
     })
   );
}