Activity workers Does not take input parameter from previous step

[tamereldamanhouri]

I tried to build a workflow with Activity workers as my workflow has many dependencies but when I just passed the parameter between step and Activity I don't receive the expected value I just received the passed parameter from SubmitActivitySuccess as below

builder
.StartWith()
.Activity("activity-authUser1")
.Output(data => data.userId, step => step.Result)
.Then()
.Input(step => step.input, data=> data.userId)
.Then(context => Debug.WriteLine("workflow complete"));

            if (approval != null)
            {
                await host.SubmitActivitySuccess(approval.Token, null);
            }

any Idea please for this issue

thanks