[Unit Test] Create wallet

SiaDrive.Api/SiaApi.h

@@ -12,6 +12,8 @@ public:
 	{
 		Success,
 		NotImplemented,
+		RequestError,
+		WalletExists,
 		WalletLocked,
 		WalletUnlocked,
 		WalletNotCreated
@@ -42,6 +44,7 @@ public:
 
 	public:
 		_SiaApiError Create(const _SiaSeedLanguage& seedLanguage, String& seed);
+		bool Refresh();
 		_SiaApiError Restore(const String& seed);
 		_SiaApiError Lock();
 		_SiaApiError Unlock();