Creating a login method in the auth service

auth.service.ts

import { Auth, signInWithEmailAndPassword } from '@angular/fire/auth';

import { Injectable } from '@angular/core';
import { LoginData } from '../interfaces/login-data.interface';

@Injectable({
  providedIn: 'root',
})
export class AuthService {
  constructor(private auth: Auth) {}

  login({ email, password }: LoginData) {
    return signInWithEmailAndPassword(this.auth, email, password);
  }
}