In angular 5 ,Post data sending by http - angular5

Question

I am sending post data for login (mobile and password). but i did not get response. below i attached two file 1) sign-in.component.ts and 2) user.service.ts . when click on submit button than call OnSubmit function(sign-in.component.ts)
sign-in.component.ts
import { Component, OnInit } from '#angular/core';
import { UserService } from '../../shared/user.service';
import { HttpErrorResponse } from '#angular/common/http';
import { Router } from '#angular/router';
#Component({
selector: 'app-sign-in',
templateUrl: './sign-in.component.html',
styleUrls: ['./sign-in.component.css']
})
export class SignInComponent implements OnInit {
isLoginError : boolean = false;
constructor(private userService : UserService,private router : Router) { }
ngOnInit() {
}
OnSubmit(userName,password){
console.log(userName + password);
this.userService.userAuthentication(userName,password)
.subscribe((data : any)=>{
console.log(data);
//localStorage.setItem('userToken',data.access_token);
this.router.navigate(['/home']);
},
(err : HttpErrorResponse)=>{
console.log(HttpErrorResponse);
this.isLoginError = true;
});
}
}
user.service.ts
import { Injectable } from '#angular/core';
import { HttpClient, HttpHeaders } from '#angular/common/http';
import { Response } from "#angular/http";
import { Observable } from 'rxjs';
//import { Http, Response, RequestOptions, Headers } from '#angular/http';
//import 'rxjs/add/operator/map';
import { User } from './user.model';
#Injectable()
export class UserService {
readonly rootUrl = 'http://192.168.0.112:3001/admin/login';
constructor(private http: HttpClient) { }
userAuthentication(userName, password) {
var data = "mobile=" + userName + "&password=" + password ;
console.log(data);
var reqHeader = new HttpHeaders({ 'Content-Type': 'application/json','No-Auth':'True' });
const httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Authorization': 'my-auth-token'
})
};
return this.http.post('http://192.168.0.112:3001/admin/login',data,httpOptions);
}
}