Have php platform i want to show data from frappe is it possible?

When i called the rest api from my application (built on codeignitor) its showing the error like this
Array ( [exception] => frappe.exceptions.PermissionError: Device [exc] => [“Traceback (most recent call last):\n File "apps/frappe/frappe/app.py", line 66, in application\n response = frappe.api.handle()\n File "apps/frappe/frappe/api.py", line 131, in handle\n data = frappe.call(frappe.client.get_list, doctype, **frappe.local.form_dict)\n File "apps/frappe/frappe/init.py", line 1474, in call\n return fn(*args, **newargs)\n File "apps/frappe/frappe/client.py", line 63, in get_list\n return frappe.get_list(**args)\n File "apps/frappe/frappe/init.py", line 1730, in get_list\n return frappe.model.db_query.DatabaseQuery(doctype).execute(*args, **kwargs)\n File "apps/frappe/frappe/model/db_query.py", line 105, in execute\n raise frappe.PermissionError(self.doctype)\nfrappe.exceptions.PermissionError: Device\n”] [_error_message] => Insufficient Permission for Device )