annot read property 'map' of undefined

[smartcatdev]

Listing channels ...
/usr/local/lib/node_modules/slack-history-cleaner/index.js:28
        const userMap = new Map(data.users.map(u=>[u.id, u.name]));
                                          ^

TypeError: Cannot read property 'map' of undefined
    at Request.request [as _callback] (/usr/local/lib/node_modules/slack-history-cleaner/index.js:28:43)
    at Request.self.callback (/usr/local/lib/node_modules/slack-history-cleaner/node_modules/request/request.js:186:22)
    at emitTwo (events.js:106:13)
    at Request.emit (events.js:191:7)
    at Request.<anonymous> (/usr/local/lib/node_modules/slack-history-cleaner/node_modules/request/request.js:1163:10)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)
    at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/slack-history-cleaner/node_modules/request/request.js:1085:12)
    at IncomingMessage.g (events.js:286:16)
    at emitNone (events.js:91:20)