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我有一个 access_denied 错误，仅在我的 Web 应用程序中的某些用户尝试登录用户名/密码时发生。使用授权扩展将 auth0-js 9.3.3 插件用于 VueJS 2.0 SPA。

我在 Auth0 的日志窗口中得到以下响应。我怎样才能调试这些类型的错误，看看是什么原因？

这导致 access_token 和 id_token 为空。

  {
    "date": "2018-06-03T11:15:15.478Z",
    "type": "f",
    "description": "Unexpected token { in JSON at position 19",
    "connection": null,
    "connection_id": "",
    "client_id": "1ySh5N0sOXxMkcAslnuhRfxO5BloY56t",
    "client_name": "IRIS",
    "ip": "80.57.245.139",
    "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36",
    "details": {
      "body": {
        "wa": "wsignin1.0",
        "wresult": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJ1c2VyX2lkIjoiNWFlODM0ZTc5MjA4YjgwNThhNGEyMDFkIiwiZW1haWwiOiJtYXJnZXJ0aG8xQGdtYWlsLmNvbSIsImVtYWlsX3ZlcmlmaWVkIjp0cnVlLCJsYXN0X3Bhc3N3b3JkX3Jlc2V0IjoiMjAxOC0wNS0xMlQxNDo1Njo0My4xNzFaIiwic2lkIjoiVVZQSThRWG9RdHRlNzg4c2c0Yy14VHZqNnFRRHdQVHMiLCJpYXQiOjE1MjgwMjQ1MTMsImV4cCI6MTUyODAyNDU3MywiYXVkIjoidXJuOmF1dGgwOjUwMXN0OlVzZXJuYW1lLVBhc3N3b3JkLUF1dGhlbnRpY2F0aW9uIiwiaXNzIjoidXJuOmF1dGgwIn0.lnK7k568DtWiUUEQEqn1PIOAQGeGQ6kg2Y6cwZUyl655ae-9dA-uM4oijD3ByDwVBL8aqFxxAAZmdPOr8pSpehTgsI7WTYrZee1sT2i80zG2IaKb-0Ue8Yx_7aGNMzhXVZHdkdY13EL5gzNeV52IVlhQLmUtDL9C4LZqApjN7wk",
        "wctx": "{\"strategy\":\"auth0\",\"auth0Client\":\"eyJuYW1lIjoibG9jay5qcyIsInZlcnNpb24iOiIxMC4xOC4wIiwibGliX3ZlcnNpb24iOiI4LjcuMCJ9\",\"tenant\":\"501st\",\"connection\":\"Username-Password-Authentication\",\"client_id\":\"1ySh5N0sOXxMkcAslnuhRfxO5BloY56t\",\"response_type\":\"token id_token\",\"scope\":\"openid profile email groups permissions roles\",\"protocol\":\"oauth2\",\"redirect_uri\":\"http://localhost:8080/callback\",\"state\":\"s31LeZ-DQZLfAX10cTZ4AcoP9E7-nl-w\",\"nonce\":\"0j2CVd8Aogz2sgh8MaetsgEEq-uKo0sN\",\"sid\":\"UVPI8QXoQtte788sg4c-xTvj6qQDwPTs\",\"audience\":\"https://iris.501st.nl\",\"realm\":\"Username-Password-Authentication\",\"session_user\":\"5b13cdc121652a131b057eb4\"}"
      },
      "qs": {},
      "connection": null,
      "error": {
        "message": "Unexpected token { in JSON at position 19",
        "oauthError": "access_denied",
        "type": "oauth-authorization"
      }
    },
    "hostname": "XXXX.eu.auth0.com",
    "user_id": "auth0|5ae834e79208b8058a4a201d",
    "user_name": "XXXXX@gmail.com",
    "log_id": "90020180603111515478182853610644826347557693433397116978"
  }

这是我用于身份验证的代码：

import decode from 'jwt-decode'
import auth0 from 'auth0-js'
import Router from 'vue-router'
const ID_TOKEN_KEY = 'id_token'
const ACCESS_TOKEN_KEY = 'access_token'

const CLIENT_ID = process.env.VUE_APP_AUTH0_CLIENT_ID
const CLIENT_DOMAIN = process.env.VUE_APP_AUTH0_CLIENT_DOMAIN
const SCOPE = 'openid profile email groups permissions roles'
const AUDIENCE = process.env.VUE_APP_AUTH0_AUDIENCE

const auth = new auth0.WebAuth({
    clientID: CLIENT_ID,
    domain: CLIENT_DOMAIN
})

export function login () {
    auth.authorize({
        responseType: 'token id_token',
        redirectUri: process.env.VUE_APP_AUTH0_REDIRECT,
        audience: AUDIENCE,
        scope: SCOPE
    })
}

export function getProfile () {
    const accessToken = localStorage.getItem('access_token')

    if (!accessToken) {
        console.log('Access token must exist to fetch profile')
    }

    if (accessToken) {
        return new Promise((resolve, reject) => {
            auth.client.userInfo(accessToken, function (err, profileData) {
                if (err) {
                    if (err.stack) {
                        console.log(err.stack)
                    } else {
                        console.log(err)
                    }
                }
                if (!profileData) {
                    console.log('Logging out because cannot get profile data!')
                    logout()
                    reject(Error('Cannot get profile data'))
                    return false
                }
                if (profileData && !profileData.email_verified) {
                    alert('Je hebt een e-mail grekegen om je e-mailadres te valideren. Zodra je e-mail is gevalideerd kan je opnieuw inloggen.')
                    logout()
                    reject(Error('Email not verified'))
                } else if (profileData['https://iris.501st.nl/app_metadata'].authorization.groups.length === 0) {
                    alert('Je account moet nog worden goedgekeurd door de GWM voordat je toegang krijgt tot IRIS. Neem contact op met de GWM.')
                    logout()
                    reject(Error('No groups configured'))
                } else if (!profileData['https://iris.501st.nl/user_metadata'].costumes) {
                    alert('Je hebt nog geen kostuums aan je account gekoppeld, vraag de GWM om deze voor je in te regelen.')
                    logout()
                    reject(Error('No costumes configured'))
                } else if (profileData) {
                    resolve(profileData)
                } else {
                    console.log('Logging out because cannot get profile data!')
                    logout()
                    reject(Error('Cannot get profile data'))
                }
            })
        })
    }
}

const router = new Router({
    mode: 'history'
})

export function logout () {
    clearIdToken()
    clearAccessToken()
    router.go('/')
}

export function requireAuth (to, from, next) {
    if (!isLoggedIn()) {
        next({
            path: '/',
            query: { redirect: to.fullPath }
        })
    } else {
        next()
    }
}

export function getIdToken () {
    return localStorage.getItem(ID_TOKEN_KEY)
}

export function getAccessToken () {
    return localStorage.getItem(ACCESS_TOKEN_KEY)
}

function clearIdToken () {
    localStorage.removeItem(ID_TOKEN_KEY)
}

function clearAccessToken () {
    localStorage.removeItem(ACCESS_TOKEN_KEY)
}

// Helper function that will allow us to extract the access_token and id_token
function getParameterByName (name) {
    let match = RegExp('[#&]' + name + '=([^&]*)').exec(window.location.hash)
    return match && decodeURIComponent(match[1].replace(/\+/g, ' '))
}

// Get and store access_token in local storage
export function setAccessToken () {
    let accessToken = getParameterByName('access_token')
    if (accessToken) {
        localStorage.setItem(ACCESS_TOKEN_KEY, accessToken)
    }
}

// Get and store id_token in local storage
export function setIdToken () {
    let idToken = getParameterByName('id_token')
    if (idToken) {
        localStorage.setItem(ID_TOKEN_KEY, idToken)
    }
}

export function isLoggedIn () {
    const idToken = getIdToken()
    return !!idToken && !isTokenExpired(idToken)
}

function getTokenExpirationDate (encodedToken) {
    const token = decode(encodedToken)
    if (!token.exp) { return null }

    const date = new Date(0)
    date.setUTCSeconds(token.exp)

    return date
}

function isTokenExpired (token) {
    const expirationDate = getTokenExpirationDate(token)
    return expirationDate < new Date()
}
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