Tusker API integration

[djudjuu]

Write a client and/or dataclass that

• insomnia collection to hit endpoints
• [ ] gets the credentials from some config/ .env file => do when moving to production
• get invoices
  • pulls data for a given phone number, gets the customer ID then gets all invoices/shipments from that customer
  • do some meaningful filtering (e.g. going back at most until a date X (we dont want to pull super old data). but definitely want to get the latest versions of all invoices that we have in our DB
• has a helper that transforms the data from what we are getting from Tusker into what we can use to insert into our DB
• as a start, return some mock-data that is approximately what we will be getting from Tusker