getBalance method
REST call for retrieving accounts data from Investec
Implementation
@override
Future<AccountBalanceEntity> getBalance(String accountId) async {
final uri = EndpointBuilder.uri('za/pb/v1/accounts/$accountId/balance');
final headers = <String, String>{
'Authorization': 'Bearer ${token.accessToken}',
};
final request = await httpClient.get(uri, headers: headers);
return AccountBalanceModel.fromJson(
jsonDecode(request.body) as Map<String, dynamic>,
);
}