[Python] Simple_Salesforce Python Connected App Sandbox

I am trying to use simple-salesforce to connect to a sandbox.

Refer: https://simple-salesforce.readthedocs.io/en/stable/user_guide/examples.html

I can successfully connect with a username/password/token and domain=test.

sf = Salesforce(username='???',password='???',security_token='???',domain='test')


Now, I am moving to a connected app ... my problem is that the documentation says I can use:

sf = Salesforce(consumer_key='???', consumer_secret='???', domain='???.my')


Then it states "If you’d like to enter a sandbox, simply add domain='test' to your Salesforce() call."

So, that would now be:

sf = Salesforce(consumer_key='???', consumer_secret='???', domain='test')


But there is now nothing to tell it my instance and if I pass that, then I get:

SalesforceAuthenticationFailed: Authentication failed (code: INVALID AUTH): You must submit either a security token or organizationId for authentication

I tried adding the organizationId (both 15 and 18 digits), but I still got the error.

I tried adding the full domain rather than test, which was:

sf = Salesforce(consumer_key='???', consumer_secret='???', domain='???.sandbox.my')


Plus I also tried:

sf = Salesforce(username='???', consumer_key='???', consumer_secret='???', domain='???.sandbox.my')

sf = Salesforce(username='???', organizationId='???', consumer_key='???', consumer_secret='???', domain='???.sandbox.my')

sf = Salesforce(organizationId='???', consumer_key='???', consumer_secret='???', domain='???.sandbox.my')


I am obviously missing how this works, but I cannot find it in the documentation.

Has anyone done this successfully?

Am I missing something basic here?

Thanks in advance!!

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