* add types to transformers
* minor fixes for test data creator
* Working on refunds
* Update migration files to include client contacts
* Working on refunds
* Working on refunds
* Working on refunds
* Refund Tests
* Working on refund tests
* Ensure payments, invoice and credit amount balance in the validator prior to saving
* additional payment validation rules and tests for processing payments
* Factories for credits
* Tests for payments
* Working on updating a payment
* Working on updating a payment
* fixes for updating a payment
* Working on Payment Tests
* More tests for payments, formrequests
* remove product_key as required from products
* Provide failsafe creation of invoice invitations
* URL Links for invitations
* open up route for invitations
* Set DB by Invite
* Set DB By invitation Key
* Tests for setting DB based on user email address
* Middleware for setting db by email address
* fixes for tets
* fixes for tests
* Tests for bulk actions
* Payments API
* Fixes for tests
