Calling service in Angular

I'm working on an angular project, and I'm stuck. I've created a service that does an API request and stores the data in an interface. I have a method in a component that passes an identifier to the service to update the API URL. The structure of my project looks like this.

-app module

----data-component

----map-component

-request service

I believe the issue is in my data.component.ts file. My app.component.html file references each component and places them side by side, but …

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