get https://{environment}.masspay.io/{VERSION}/payout/user/history
This GET endpoint is used to retrieve a list of all transactions, including payouts, loads, and spendbacks, for all users. 
 You can use this endpoint to obtain a comprehensive history of transactions for all users, allowing you to track and analyze their payment activities over time. 
 The response will contain a JSON array of transaction objects, each including transactions details.
