Changes to Register a customer API bank connection

added the new optional request property accounts/items/status

added the new optional request property bank_url

added the new optional request property icon_url

added the optional property bank_url to the response with the 201 status

added the optional property error_code to the response with the 400 status

added the optional property error_code to the response with the 422 status

added the optional property error_reason to the response with the 400 status

added the optional property error_reason to the response with the 422 status

added the optional property icon_url to the response with the 201 status

added the required property created_at to the response with the 201 status

added the required property updated_at to the response with the 201 status

endpoint added