Start Salesforce OAuth flow
Parameters:
Unique identifier for the client instance requesting authorization
Client ID for white labeling, if not provided will use default credentials
Optional OAuth scopes to request (space-separated string)
Optional URL to redirect to after authorization completes
Salesforce instance URL (e.g., https://mycompany.salesforce.com). If not provided, will use default login.salesforce.com
Successful Response
The response is of type any
.