我尝试用相同的凭据链接更多帐户（电子邮件和密码，谷歌和Github），但当我尝试用github登录时，我得到这个错误：
Firebase错误：Firebase：错误（身份验证/帐户存在，但凭据不同）。
Google认证工作正常，数据库情况如下：
image
这里我调用authStore.js文件中的函数（这些函数在下一个代码块中显示）。

async function loginGoogle() {
        await authHandlers
            .loginGoogle()
            .then(() => {
                goto('/');
            })
            .catch((error) => {
                if (error.code === 'auth/account-exists-with-different-credential') {
                    alert('You have already signed up with a different auth provider for that email.');
                } else {
                    console.error(error);
                }
            });
    }

    async function loginGithub() {
        await authHandlers
            .loginGithub()
            .then(() => {
                goto('/');
            })
            .catch((error) => {
                if (error.code === 'auth/account-exists-with-different-credential') {
                    console.error(error);
                    alert('You have already signed up with a different auth provider for that email.');
                } else {
                    console.error(error);
                }
            });
    }

下面的代码是我调用firebase的地方。

export const authHandlers = {
    login: async (email, password) => {
        await signInWithEmailAndPassword(auth, email, password);
    },
    signup: async (email, password, username) => {
        const { user } = await createUserWithEmailAndPassword(auth, email, password);
        await updateProfile(user, {
            displayName: username
        });
        sendEmailVerification(user)
            .then(() => {
                console.log('Email sent');
            })
            .catch((error) => {
                console.log(error);
            });
    },
    logout: async () => {
        await signOut(auth);
    },
    loginGoogle: async () => {
        await signInWithPopup(auth, new GoogleAuthProvider());
    },
    loginGithub: async () => {
        await signInWithPopup(auth, new GithubAuthProvider());
    },