WebApp-Your-API appsettings does not correspond with IDownstreamApi expected settings

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [x] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
> Configure the sample and run. If webpage appears, navigate to ToDoList section.

### Expected/desired behavior
> The sample runs without running into exceptions based on improper fields in appsettings.