Changes to Returns thread metadata for usage analytics.

added the new optional query request parameter usageFrom

added the new optional query request parameter usageGroupBy

added the new optional query request parameter usagePageSize

added the new optional query request parameter usageTo

added the non-success response with the status 400

added the optional property items/isDeleted to the response with the 200 status

added the optional property items/usageGroupKey to the response with the 200 status

added the optional property items/usageOn to the response with the 200 status

added the optional property items/usageUserId to the response with the 200 status

added the optional property items/model to the response with the 200 status

added the optional property items/provider to the response with the 200 status

deleted the header request parameter Authorization

the endpoint scheme security oauth2 was added to the API

endpoint added