Resolves #193

This both upgrades the Instagram provider to use the new login system (only business and creator accounts are allowed), as well as adds some typing and better error data.

The two most important upstream documentation are:

1. here for creating a meta app.
2. here for details on what fields to use for retrieving specific user's data
3. here for more advanced scoped access to authorize for things like messages and content management.

Note

Currently I left as default my original user's fields:

• id refers to the user's id within your current Meta application.
• user_id refers to the actual Instagram's unique user id.

@atinux WDYT? Should I change the default to be user_id or leave id as a general purpose?