return this.httpClient
  .post(this.baseUrl + 'login' , usuarioForm)
  .map(response => {
      return response;
  }).catch((error: any) => {
    return Observable.throw(new Error(error));
});

loginAccess():Promise<any>{
let loginApi = {
  username: this.usuario.controls['email'].value,
  password: this.usuario.controls['password'].value,
  tokenFacebook: this.usuario.controls['tokenFacebook'].value,
  userIdFacebook: this.usuario.controls['userIdFacebook'].value
}
return new Promise(resolve => {
  this.loginProvider.login(loginApi).subscribe(
    result => {
      resolve(result);
    }, error => {
      return error;
    });
});
}

this.loginAccess().then(function(result){
      console.log(result);
}, function(error){
      console.log(error);
})