fixing when no response and other small fixes

Author: lohanidamodar

templates/flutter/lib/client.dart.twig

@@ -110,22 +110,25 @@ class Client {
 
         try {
             if(headers['content-type'] == 'multipart/form-data') {
-                return http.request(path, data: FormData.fromMap(params), options: options);
+                return await http.request(path, data: FormData.fromMap(params), options: options);
             }
 
             if (method == HttpMethod.get) {
                 params.keys.forEach((key) {if (params[key] is int || params[key] is double) {
                 params[key] = params[key].toString();
                 }});
 
-                return http.get(path, queryParameters: params, options: options);
+                return await http.get(path, queryParameters: params, options: options);
             } else {
-                return http.request(path, data: params, options: options);
+                return await http.request(path, data: params, options: options);
             }
         } on DioError catch(e) {
+          if(e.response == null) {
+            throw {{spec.title | caseUcfirst}}AppwriteException(e.message);
+          }
           throw {{spec.title | caseUcfirst}}Exception(e.response.data['message'],e.response.data['code'], e.response.data);
         } catch(e) {
-          throw {{spec.title | caseUcfirst}}Exception(e.message, 0);
+          throw {{spec.title | caseUcfirst}}Exception(e.message);
         }
     }
 }

templates/flutter/lib/exception.dart.twig

@@ -5,6 +5,6 @@ class {{spec.title | caseUcfirst}}Exception implements Exception {
   final int code;
   final dynamic response;
 
-  {{spec.title | caseUcfirst}}Exception([this.message = "", this.code = 0, this.response]);
+  {{spec.title | caseUcfirst}}Exception([this.message = "", this.code, this.response]);
 
 }