This interface can be used for transfers between master- and sub-accounts and transfers
The API Key needs universal transfer permission when calling.It supports transfers between master account and sub-accounts, and also supports transfers between different types of accounts.It supports transfer between master account and sub-accounts (only applicable to master account APIKey).MARGIN_V2 only supports internal transfers between MARGIN and does not support transfers between master- and sub-accounts.ISOLATED_V2 only supports internal transfers between ISOLATED and does not support transfers between master- and sub-accounts.