Unable to sync Shopify store with ERPNext using Shopify Connector

Hello I am a Shopify user but I’m new to ERPNext. I use ERPNext app for Shopify. I am using the free (1 account) version to try it out, but I got an Authentication Error for Frappe. I am including the log. Does anyone know how to fix this so I can Sync my Shopify Store with ERPNext, to try this tool out?

Traceback (most recent call last):
File “/home/frappe/benches/bench-2016-10-07/apps/erpnext_shopify/erpnext_shopify/api.py”, line 32, in sync_shopify_resources
sync_products(shopify_settings.price_list, shopify_settings.warehouse)
File “/home/frappe/benches/bench-2016-10-07/apps/erpnext_shopify/erpnext_shopify/sync_products.py”, line 16, in sync_products
sync_shopify_items(warehouse, shopify_item_list)
File “/home/frappe/benches/bench-2016-10-07/apps/erpnext_shopify/erpnext_shopify/sync_products.py”, line 21, in sync_shopify_items
for shopify_item in get_shopify_items():
File “/home/frappe/benches/bench-2016-10-07/apps/erpnext_shopify/erpnext_shopify/shopify_requests.py”, line 100, in get_shopify_items
filter_condition = get_filtering_condition()
File “/home/frappe/benches/bench-2016-10-07/apps/erpnext_shopify/erpnext_shopify/shopify_requests.py”, line 79, in get_filtering_condition
shopify_settings = get_shopify_settings()
File “/home/frappe/benches/bench-2016-10-07/apps/erpnext_shopify/erpnext_shopify/shopify_requests.py”, line 21, in get_shopify_settings
d.password = d.get_password()
File “/home/frappe/benches/bench-2016-10-07/apps/frappe/frappe/model/base_document.py”, line 597, in get_password
return get_decrypted_password(self.doctype, self.name, fieldname, raise_exception=raise_exception)
File “/home/frappe/benches/bench-2016-10-07/apps/frappe/frappe/utils/password.py”, line 19, in get_decrypted_password
frappe.throw(_(‘Password not found’), frappe.AuthenticationError)
File “/home/frappe/benches/bench-2016-10-07/apps/frappe/frappe/init.py”, line 299, in throw
msgprint(msg, raise_exception=exc, title=title, indicator=‘red’)
File “/home/frappe/benches/bench-2016-10-07/apps/frappe/frappe/init.py”, line 292, in msgprint
_raise_exception()
File “/home/frappe/benches/bench-2016-10-07/apps/frappe/frappe/init.py”, line 265, in _raise_exception
raise raise_exception, encode(msg)
AuthenticationError: Password not found