What are leases?

A Lease is the core concept in Sandbox Studio. It represents a time-bound  and/or budget-bound  grant of access to a temporary AWS account for one or more users. 
 When a lease is created, Sandbox Studio provisions access to a short-lived AWS account. When the lease ends — whether through expiry, budget exhaustion, or manual revocation — that access is automatically removed. 
 
 Key Characteristics 
 
 
 Temporary: Every lease has a defined start time. It may also have an expiry date, but this is optional. A lease ends when its expiry date is reached, its budget is exhausted, or it is manually revoked — whichever comes first. 
 Scoped to an AWS account : Each lease maps to a single temporary AWS account. 
 Shareable : A lease can be assigned to a single user or shared across a group of users. All users on a shared lease access the same AWS account. 
 Budget-controlled : A lease can have a spending budget. If the account's costs hit the budget threshold, the lease is automatically terminated. 
 Automated : Lease creation, access provisioning, and cleanup are fully automated. No manual account handoff required.