How to build a request to the json server and get the data?

Question

Angular

Good afternoon!
I spent two days to get user data (in json format), tell me \ help (:
The component in which there is a form, mail is entered into it, then the user data is received.
A model in which all fields are registered

export class UserData {
  constructor(
    public group: string,
    public name: string,
    public email: string,
    public password: string,
    public id?: number
  ) {}
}

And the service that performs this processing, after which it gives an answer.
Really googled a lot, nothing helps.

Answer 1

https://www.sitepoint.com/angular-rxjs-create-api-...