Changes to Print current API usage.

removed the optional property billingPeriod/apiKey from the response with the 200 status

removed the optional property billingPeriod/billingStatus from the response with the 200 status

removed the optional property billingPeriod/stripeCurrentPeriodEnd from the response with the 200 status

removed the optional property billingPeriod/stripeCurrentPeriodStart from the response with the 200 status

removed the optional property subscription/planEnded from the response with the 200 status

removed the optional property subscription/planStatus from the response with the 200 status

removed the optional property subscription/priceOverageUSD from the response with the 200 status

removed the optional property subscription/priceUSD from the response with the 200 status

removed the optional property subscription/priorPlanStarted from the response with the 200 status

added the non-success response with the status 429

added the optional property subscription/overageDiscountInPercent to the response with the 200 status

added the optional property subscription/planDiscountInPercent to the response with the 200 status