Retrieves membership metadata and attributes from MembershipId
in an identity store.
See https://www.paws-r-sdk.com/docs/identitystore_describe_group_membership/ for full documentation.
identitystore_describe_group_membership(IdentityStoreId, MembershipId)
[required] The globally unique identifier for the identity store.
[required] The identifier for a GroupMembership
in an identity store.