Improved api usage, organised my code a bit

lib/common/apifunctions/find_organisations.dart

@@ -0,0 +1,56 @@
+import 'dart:convert';
+import 'dart:async';
+import 'package:http/http.dart' as http;
+import 'package:local_spend/common/functions/get_token.dart';
+
+class Organisation {
+  var id = 0;
+  var name = "";
+  var postcode = "";
+  var street_name = "";
+  var town = "";
+}
+
+List<Organisation> jsonToOrganisations(String json) {
+  Map decoded = jsonDecode(json);
+  print(decoded);
+
+  List<dynamic> validated = decoded['validated'];
+//  Map organisation = validated[0];
+
+  List<Map> organisations = new List<Map>();
+
+  validated.forEach((element) => organisations.add(element));
+
+//  print(organisations);
+}
+
+Future<List<Organisation>> findOrganisations(String search) async {
+  final url = "https://dev.peartrade.org/api/search";
+  var token;
+
+  await getToken().then((result) {
+    token = result;
+  });
+
+  Map<String, String> body = {
+    "search_name":search,
+    "session_key":token,
+  };
+
+  final response = await http.post (
+    url,
+    body: json.encode(body),
+  );
+
+  print(response.body);
+
+  if (response.statusCode == 200) {
+    //request successful
+    return jsonToOrganisations(response.body);
+  } else {
+    // not successful
+    return null;
+  }
+
+}