First try appcommon as library

projects/common/src/lib/services/user.service.ts

@@ -0,0 +1,18 @@
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs';
+import { IUser } from '../models/user';
+import { HttpClient } from "@angular/common/http";
+import { AppConfig } from "../shared/app.config";
+
+@Injectable()
+export class UserService {
+  private _apiEndPoint: string;
+
+  constructor(public httpClient: HttpClient, public appConfig: AppConfig) {
+    this._apiEndPoint = "";//appConfig.getConfig("apiEndPoint");
+  }
+
+  getCurrentUser(): Observable<IUser> {
+    return this.httpClient.get<IUser>(`${this._apiEndPoint}/api/v1/currentuser`);
+  }
+}