TypeError: handoff.isAgent is not a function

[jiunhonglim]

I am getting this error. When i looked into the codes I noticed that indeed it is a function (not sure if its a typescript shorthand) and it is not declared anywhere.

I am also trying to develop my Bot in NodeJS (Javascript), not sure if anyone has managed to integrate this. (Planning to use this for MS Teams)

Edit. I had to change some of the codes to work for my scenario.