21474: API User must be the parent account to transfer phone numbers.ERROR: 21474error-21474 page anchorERROR Error - 21474error---21474 page anchor API User must be the parent account to transfer phone numbers.api-user-must-be-the-parent-account-to-transfer-phone-numbers page anchorThe API user can not be a subaccount, must be a parent account to transfer phone numbers between parent and child accounts.