Removal of api key

Network calls,
integration of retrofit api
added backup api

lib/data/network/safeApiCall.dart

@@ -0,0 +1,30 @@
+import 'dart:io';
+
+import 'package:dio/dio.dart';
+import 'package:retrofit/retrofit.dart';
+
+import '../../main.dart';
+
+mixin SafeApiCall {
+  Future<T> getDataFromApiCall<T>(Future<HttpResponse<T>> apiCall) async {
+    try {
+      HttpResponse<T> httpResponse = await apiCall;
+      return httpResponse.data;
+    } on DioError catch(dioError) {
+      Map<String, dynamic>? errorResponse = dioError.response?.data;
+      String error;
+
+      if (errorResponse?["error"] != null){
+        error = errorResponse!["error"];
+      } else if (dioError.error != null){
+        error = dioError.error;
+      } else {
+        error = "Failed to retrieve data from api";
+      }
+
+      logger.e(dioError.error);
+
+      throw HttpException(error);
+    }
+  }
+}