- Added `get_me` and `refresh_session` parameters and responses for user session management.
- Implemented `sessions_client` for handling session-related API calls.
- Created models for `Credentials`, `Category`, `Product`, and `Service` with validation.
- Defined Swagger specifications for `Credentials`.
- Ensured all generated files are marked as non-editable to prevent manual changes.
The code changes include adding the `AppExchange` field to the `Account` and `Company` models in the `sfgate` and `plex` packages. This field is used to store the Salesforce AppExchange URL.