The ecash is a bearer instrument that you purchase with bitcoin. You don't deposit and withdraw. There are no accounts to withdraw from. You redeem tokens which were purchased previously.
Unless I misunderstand how it works, I'm an ecash noob. Happy to be educated. nostr:nprofile1qqs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccpzemhxue69uhk2er9dchxummnw3ezumrpdejz7qgkwaehxw309a5xjum59ehx7um5wghxcctwvshszrnhwden5te0dehhxtnvdakz7qrxnfk