Angular 2 HTTP GET request from Github API - api

Question

I am new to Angular 2. As for now I am trying to fetch user data from Github API. I have one component (user.component) and here is its code:
import {Component} from '#angular/core';
import {userService} from './user.service';
import'rxjs/add/operator/map';
#Component({
selector: 'users',
template: `
<h2>Users</h2>
`,
providers: [userService]
})
export class UserComponent{
constructor(private _userService: userService)
{
this._userService.getUser().subscribe( user => {console.log(user)})
}
}
The code of user.Service.ts:
import {Injectable} from '#angular/core'
import {Http, Headers} from '#angular/http'
import'rxjs/add/operator/map';
#Injectable()
export class userService{
private username : string;
constructor (private _http:Http){
console.log("Github Service is ready...")
this.username = "example"
}
getUser(){
return this._http.get("http://api.github.com/users/"+example)
.map(res => res.json)
}
}
And this is app.module.ts:
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { UserComponent } from './user.component'
import {HttpModule } from '#angular/http';
import { AppComponent } from './app.component';
#NgModule({
imports: [ BrowserModule, HttpModule ],
declarations: [ AppComponent,UserComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule { }
And finally here is app.component.ts:
import { Component } from '#angular/core';
import { UserService } from './user.service'
#Component({
selector: 'my-app',
template: `<h1>Hello {{name}}</h1><users></users>`,
providers: [CourseService]
})
export class AppComponent { name = 'John'; }

Answer 1

You should add providers: [CourseService] to the module, not the app component.
#NgModule({
imports: [ BrowserModule, HttpModule ],
declarations: [ AppComponent,UserComponent ],
bootstrap: [ AppComponent ],
providers: [ CourseService ]
})
and remove it from the #Component decorator.
Edit: I'm glad you got this working, but the commenter is right - this was not a correct solution, I was mistaken.

Answer 2

example is not a local variable inside getUser()
I think you meant to write is:
getUser(){
return this._http.get("http://api.github.com/users/" + this.username)
.map(res => res.json)
}