Hello guys.
Salesforce gives the possibility to connect GoogleDrive, Share point so on as external data sources and extend Files with this "third-party" data sources as additional "connected sources". As I understood from documentation we can do so for any external file storage but not only for predefined list of storages. 
I've started to develop custom solution to integrate our file archive as an external data source(based on DataSource.Connection and DataSource.Provider extension) and faced a problem - I can't find instruction or explanation what I have to implement to add this external data storage to files as "connected resources".
Our external files work in separate tab and are synced well but only as external objects, not files.
Could anybody advise some documentation or hint where to find details/examples of custom "Files connect" implementation?

Hello guys.
Salesforce gives the possibility to connect GoogleDrive, Share point so on as external data sources and extend Files with this "third-party" data sources as additional "connected sources". As I understood from documentation we can do so for any external file storage but not only for predefined list of storages. 
I've started to develop custom solution to integrate our file archive as an external data source(based on DataSource.Connection and DataSource.Provider extension) and faced a problem - I can't find instruction or explanation what I have to implement to add this external data storage to files as "connected resources".
Our external files work in separate tab and are synced well but only as external objects, not files.
Could anybody advise some documentation or hint where to find details/examples of custom "Files connect" implementation?

Hi,
We have extended AuthProviderPluginClass for Amazon Cognito and now I'm fighting the issue when cognito returns an error 'Already found an entry for username...' (the situation is standard for linking of existing cognito account with the third party accounts). Next request to authentication should be successfull so I need to catch this error somewhere in handleCallback and restart the flow. Unfortunately, I don't see how to do this. All my tries to call initiate method and stop current flow are unsuccessful because system expects that handleCallback will return Auth.AuthProviderTokenResponse or raise an error. 
Does somebody face a similar issue?  I really need help.
Thanks