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{
    "/api/*":{

        "target":"http://10.104.40.14:8290/my_app",
        "secure":false,
        "logLevel":"debug"
    }
}

zone.js:2933 POST http://localhost:4200/api/security/login 401 (Unauthorized)
     <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
    <title>Error 401 Unauthorized</title>
    </head>
    <body><h2>HTTP ERROR 401</h2>
    <p>Problem accessing /de_prp/error. Reason:
    <pre>    Unauthorized</pre></p>
    </body>
    </html>

import { Injectable, OnInit } from '@angular/core';

   import { HttpClient, HttpErrorResponse, HttpHeaders } from '@angular/common/http';
        import { RequestOptions, Headers } from '@angular/http';
        import { URLSearchParams } from '@angular/http';
        @Injectable()
        export class AuthService implements OnInit {
          constructor(private http: HttpClient) { }

          ngOnInit(): void {

          }


          login(username, password, rememberMe) {
            console.log(username, password, rememberMe);

            //const headers = new HttpHeaders().set('Content-Type', 'application/json; charset=utf-8');
            const body = JSON.stringify({ username: username, password: password });
            const headers = new HttpHeaders({ 'Content-Type': 'application/json' });
            this.http.post("/api/security/login", body, { headers: headers }).subscribe(
              res => {
                console.log(res);
              },
              (err: HttpErrorResponse) => {

                console.log(err.error);
                console.log(err.name);
                console.log(err.message);
                console.log(err.status);
              }
            )
          }
          logout() {

            this.http.get("/api/auth/logout").subscribe(
              res => {
                console.log(res);
              },
              (err: HttpErrorResponse) => {

                console.log(err.error);
                console.log(err.name);
                console.log(err.message);
                console.log(err.status);
              }
            );
          }
        }