Inviting user to slack channel - Using UIPath.Slack.Activities 1.0.0 Preview release

[preethi_murali]

Hi,
I have users already invited to workspace. I am trying to invite them to channel. I am getting the following response code. Can anyone please help?
The response code is:
ResponseStatus :
{
AdditionalDetails=null,
ErrorCode=“202”,
Message=“User not found. Please give a valid user.”,
Success=false
}