我正在使用：
    vue@3.2.47
    pinia@2.0.35
    vue-router@4.1.6
我已经为使用 Firebase 数据库的身份验证创建了一个 store。代码如下：
    import { defineStore } from 'pinia'
    import { createUserWithEmailAndPassword, signInWithEmailAndPassword, signOut, onAuthStateChanged } from "firebase/auth";
    import { auth } from "@/firebase";
    
    export const useStoreAuth = defineStore('storeAuth', {
      state: () => {
        return {
          user: null,
        }
      },
      actions: {
        init() {
          onAuthStateChanged(auth, (user) => {      
            if (user) {
              this.user = {}
              this.user.id = user.uid
              this.user.email = user.email
            } else {
              this.user = null
            }
          });
        },
        registerUser(credentials) {
          createUserWithEmailAndPassword(auth, credentials.email, credentials.password).then((userCredential) => {
            const user = userCredential.user 
            this.router.push('/')
          }).catch((error) => {
            console.log('Error while registering:', error.message);
            }
          });
        },...

我想重写我的代码，使用组合 API，但是当我这样做时，我不明白如何重写我的代码，以便函数 registerUser(credentials) 可以使用 this.router.push。
我尝试重写它如下：
    const registerUser = (credentials) => {
        createUserWithEmailAndPassword(auth, credentials.email, credentials.password).then((userCredential) => {
          const firebaseUser = userCredential.user 
          router.push('/')
        }).catch((error) => {
          console.log('注册时出错：', error.message);
          }
        });
      }
但在这种情况下它不起作用...

import { useRouter } from "vue-router";
const router = useRouter();
...andyourcode...

import { useRouter } from "vue-router";
const router = useRouter();
...
registerUser(credentials, router);

const registerUser = (credentials, router) => {
  createUserWithEmailAndPassword(auth, credentials.email, credentials.password).then((userCredential) => {
    const firebaseUser = userCredential.user;
    router.push('/');
  }).catch((error) => {
    console.log('注册时出错：', error.message);
  });
}