While the Shopify documentation is complete and readable, it is not that practical for the newcomer and requires a few reading and experimentation to get it.
SPyLib can provide a simpler yet complete explanation of the OAuth process in Shopify such that it can be used as reference in the HowTo docs that show how to use SPyLib.
Make one or two sequence diagram:
Base app installation OAuth with optional offline token retrieval
App login OAuth process for online token retrieval
While the Shopify documentation is complete and readable, it is not that practical for the newcomer and requires a few reading and experimentation to get it. SPyLib can provide a simpler yet complete explanation of the OAuth process in Shopify such that it can be used as reference in the HowTo docs that show how to use SPyLib.
Make one or two sequence diagram: