I'm trying to auth with FPL api can anyone help me with the below, I could not find what is wrong

here is the authentication guide https://medium.com/@bram.vanherle1/fantasy-premier-league-api-authentication-guide-2f7aeb2382e4

I get this error

status: 200

statusText: "OK"

url: "https://cors-anywhere.herokuapp.com/https://users.premierleague.com/accounts/login/"

ok: false

name: "HttpErrorResponse"

message: "Http failure during parsing for https://cors-anywhere.herokuapp.com/https://users.premierleague.com/accounts/login/"

import { HttpClient } from '@angular/common/http';




constructor(private http: HttpClient) {}



getData() {


    const proxy = 'https://cors-anywhere.herokuapp.com/';

    this.http
      .post(${proxy}https://users.premierleague.com/accounts/login/,
   {
      redirect_uri: 'https://fantasy.premierleague.com/a/login',
      app: 'plfpl-web',
      login: 'my-email',
      password: 'may-pass'
    }
)
      .subscribe((data) => {
        console.log(data);
      });
  }
}