Salesforce Oauth credential

[taylordowns2000]

User story

As a user connecting to Salesforce, I'd like to be able to use an Oauth2 connection rather than my username/password/securityToken.

Details

1. This is a new "Salesforce Oauth" credential type.

   

2. The "sign in with google" here should be replaced by Sign in with Salesforce button:

   

Implementation notes

We will probably need to create a Salesforce connected app for the global OpenFn instance (app.openfn.org) and another for testing locally (localhost:4000) - https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_oauth_and_connected_apps.htm

From @aleksa-krolls : Customers will need different scopes depending on their requirements and there could be use cases for using all sorts of combos of these. I think usually we’d need refresh_token, id, api… and maybe full or lightning (not our lighting) but we should build the adaptor in a way we can change these. See this docs article for more on scopes: https://help.salesforce.com/s/articleView?id=sf.remoteaccess_oauth_tokens_scopes.htm&language=en_US&type=5

1. Check Google Oauth form
2. Consider how we know which scopes to show to the user

Release notes

• Added Oauth2 option for Salesforce connections

User acceptance criteria

• [x] I can create a new Salesforce credential
• [x] When I create a new Salesforce credential, I can select which scopes to request.
• [ ] I can successfully create records in a Salesforce system using the Salesforce adaptor (version: __ @mtuchi )

[taylordowns2000]

Hey team! Please add your planning poker estimate with Zenhub @midigofrank @stuartc @elias-ba @jyeshe

[taylordowns2000]

• nothing that the final bit here is handling the lack of an expires_at value on the initial credential save.
• if we don't get an expires at, we should probably handle this when we are checking expiry not on save.