User account information for a particular Storage Gateway.
One of the following schemas:
Account_1_0_0
{ "DATA_TYPE": "account#1.0.0", "identity_id": "011a42b9-62d7-49eb-8328-c2e454af88a1", "storage_gateway_id": "62c250f4-af41-4074-89a9-b6aff8c56fcb", "username": "string" }