Change existing user account's permissions

This endpoint returns modifies account and environment access permissions for an existing user account.

In the request payload and when changing permissions for an entity that user already has explicit permissions for, only those permission properties needing changes should be set. For example, if user already has permission to read reporting for environment 'X' (canAccessReporting = true) and admin rights need to be enabled, it is sufficient to set only canAdminister = true and no other properties against that environment.