Insufficient Permission for Doctype

Frappe Framework
#1

Hi,

I am trying to add data As Guest into Doctype but it returns

“Insufficient Permission for Store Clients”

This is the code I have

import frappe
import json
import os


@frappe.whitelist(allow_guest=True)
def sign_up():
    try:

        user = {
            "doctype": "Store Clients",
            "email": "sdsd@gmail.com",
            "first_name": "aldoooo",
            "last_name": "black",
            "phone_number": "6173317837",
            "company": "dsds"
        }

        doc = frappe.get_doc(user)
        doc.insert()
        return {'Title': 'SUCCESS!', 'message': 'The profile has beed create successfully!'}

    except Exception as e:
        # print e
        return {'Title': 'ERROR!', 'message': e}
#2

try this doc.insert(ignore_permissions=True)