getWalletBalance method
Receive the balance of fiat and cryptocurrency wallets
Implementation
Future<Map<String, dynamic>?> getWalletBalance(
{required String currency}) async {
var url = Uri.https(basePath, '/users/wallets/balance');
var response = await client.post(url,
headers: headers, body: jsonEncode({'currency': currency}));
return jsonDecode(response.body);
}