Angular forms returning ERROR TypeError: "_co.service.formData is undefined"?

'm trying to make an form in angular 7 and get inout in that but the form is giving the following error : ERROR TypeError: "_co.service.formData is undefined"

now here is my code for the html part of the component :-

<form (sumbit)="signUp(form)" autocomplete="off" #form="ngForm"> <div class="form-group"> <input name="Name" class="form-control" #Name="ngModel" [(ngModel)]="service.formData.Name" required> </div> </form>

while this is the type script code

import { Component, OnInit } from '@angular/core'; import {UserService} from '../../shared/user.service'; import {NgForm} from '@angular/forms'; @Component({ selector: 'app-agent-signup', templateUrl: './agent-signup.component.html', styleUrls: ['./agent-signup.component.css'] }) export class AgentSignupComponent implements OnInit {

constructor(private service:UserService) { }

ngOnInit() { } signUp(form:NgForm) {

} }

and this is the code for user.service :-

import { Injectable } from '@angular/core'; import {UserData} from './user.model'; import {HttpClient} from '@angular/common/http'; import {environment} from '../../environments/environment'; const API_URL=environment.apiUrl; @Injectable({ providedIn: 'root' }) export class UserService { formData : UserData; constructor(private http:HttpClient) {}

createUser(formData:UserData) { return this.http.post(API_URL+'/user/signup',formData); } }

and this is the the user.model class :-

export class UserData{

public Email:string; public Password:string; public Rera_no:string; public Name:string; public Company_name:string; }

and i'm getting the following error :- ERROR TypeError: "_co.service.formData is undefined" can anybody tell me where i'm going wrong and how can i correct it ?