db.collection(collection).doc(userInfo.uid).set({     data: userInfo }).then(e => {     console.log(e) }).catch(er => {     console.log('云函数保存用户信息出错：', er) })

2019-11-14T05:26:14.923Z  云函数保存用户信息出错： { Error: errCode: -501001 resource system error | errMsg: signature is expired;

at new CloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6395:28)

at Object.returnAsCloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6447:16)

at Object.checkError (/var/user/node_modules/wx-server-sdk/index.js:1678:23)

at DocumentReference.<anonymous> (/var/user/node_modules/wx-server-sdk/index.js:1538:41)

at step (/var/user/node_modules/tslib/tslib.js:136:27)

at Object.next (/var/user/node_modules/tslib/tslib.js:117:57)

at fulfilled (/var/user/node_modules/tslib/tslib.js:107:62)

at <anonymous>

at process._tickCallback (internal/process/next_tick.js:188:7) errCode: -501001, errMsg: 'signature is expired; ' }

2019-11-14T05:49:16.209Z  云函数保存用户信息出错： { Error: errCode: -501001 resource system error | errMsg: signature is expired;

at new CloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6395:28)

at Object.returnAsCloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6447:16)

at Object.checkError (/var/user/node_modules/wx-server-sdk/index.js:1678:23)

at DocumentReference.<anonymous> (/var/user/node_modules/wx-server-sdk/index.js:1538:41)

at step (/var/user/node_modules/tslib/tslib.js:136:27)

at Object.next (/var/user/node_modules/tslib/tslib.js:117:57)

at fulfilled (/var/user/node_modules/tslib/tslib.js:107:62)

at <anonymous>

at process._tickCallback (internal/process/next_tick.js:188:7) errCode: -501001, errMsg: 'signature is expired; ' }

2019-11-15T02:48:06.867Z  云函数保存用户信息出错： { Error: errCode: -501001 resource system error | errMsg: signature is expired;

at new CloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6395:28)

at Object.returnAsCloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6447:16)

at Object.checkError (/var/user/node_modules/wx-server-sdk/index.js:1678:23)

at DocumentReference.<anonymous> (/var/user/node_modules/wx-server-sdk/index.js:1538:41)

at step (/var/user/node_modules/tslib/tslib.js:136:27)

at Object.next (/var/user/node_modules/tslib/tslib.js:117:57)

at fulfilled (/var/user/node_modules/tslib/tslib.js:107:62)

at <anonymous>

at process._tickCallback (internal/process/next_tick.js:188:7) errCode: -501001, errMsg: 'signature is expired; ' }

一点都不稳定嘛，怎么敢用？

没人处理解释，我就天天发。