老师能讲下js如何定位错误吗? 感觉js 的错误都定位的不清楚, 今天课程里有这个错误, 实在没定位到底哪儿出问题了

来源：7-16 登陆页面实现

慕设计9591090

2021-06-27

VM972 WAService.js:2 Unhandled promise rejection TypeError: User.login is not a function
    at _callee$ (login.js:15)
    at L (regenerator.js:1)
    at Generator._invoke (regenerator.js:1)
    at Generator.t.<computed> [as next] (regenerator.js:1)
    at asyncGeneratorStep (asyncToGenerator.js:1)
    at c (asyncToGenerator.js:1)
    at VM972 WAService.js:2
    at r (VM972 WAService.js:2)(env: Windows,mp,1.05.2105170; lib: 2.17.3)

class User {
....
    static async login() {
        // 获取令牌
        const token = await Token.getToken()
        wx.setStorageSync(cache.TOKEN, token)
    }
    ......
 }

getToken

class Token {
    static async getToken() {
        const res = await Http.request({
            url: "v1/token",
            data: {
                i_code: APIConfig.iCode,
                order_no: APIConfig.orderNo
            },
            method: 'POST'
        })
        return res.token
    }
}

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