What role does .pipe(take(1)) have here?

Question

What role does pipe(take(1)) have when calling the method from authService?

this.authService
  .signIn(email, password)
  .pipe(take(1))
  .subscribe(...)

Answer 1

take(1) will unsubscribe after 1 value has been received. This is useful for tidying up subscriptions to long running observables when you know you only want the first result.