Add timeouts to sign in steps so doesn't block indefinitely

lib/models/auth/oauth_credentials.dart

@@ -2,11 +2,11 @@ import 'dart:convert';
 import 'dart:io';
 
 import 'package:flutter_web_auth_2/flutter_web_auth_2.dart';
-import 'package:http/http.dart' as http;
 import 'package:logging/logging.dart';
 import 'package:result_monad/result_monad.dart';
 import 'package:uuid/uuid.dart';
 
+import '../../utils/network_utils.dart';
 import '../exec_error.dart';
 import 'credentials_intf.dart';
 
@@ -92,25 +92,22 @@ class OAuthCredentials implements ICredentials {
       return Result.ok(true);
     }
     final idEndpoint = Uri.parse('https://$serverName/api/v1/apps');
-    final response = await http.post(idEndpoint, body: {
+    final response = await postUrl(idEndpoint, {
       'client_name': 'Relatica',
       'redirect_uris': redirectUrl,
       'scopes': 'read write follow push',
       'website': 'https://myportal.social',
     });
 
-    if (response.statusCode != 200) {
-      _logger.severe('Error: ${response.statusCode}: ${response.body}');
-      return buildErrorResult(
-        type: ErrorType.serverError,
-        message: 'Error: ${response.statusCode}: ${response.body}',
-      );
-    }
+    response.match(onSuccess: (body) {
+      final json = jsonDecode(body);
+      clientId = json['client_id'];
+      clientSecret = json['client_secret'];
+    }, onError: (error) {
+      _logger.severe('Error logging in: $error');
+    });
 
-    final json = jsonDecode(response.body);
-    clientId = json['client_id'];
-    clientSecret = json['client_secret'];
-    return Result.ok(true);
+    return response.mapValue((_) => true);
   }
 
   FutureResult<bool, ExecError> _login() async {
@@ -146,15 +143,12 @@ class OAuthCredentials implements ICredentials {
         'grant_type': 'authorization_code',
         'code': code,
       };
-      final response = await http.post(url2, body: body);
-      if (response.statusCode != 200) {
-        _logger.severe('Error: ${response.statusCode}: ${response.body}');
-        return buildErrorResult(
-          type: ErrorType.serverError,
-          message: 'Error: ${response.statusCode}: ${response.body}',
-        );
-      }
-      accessToken = jsonDecode(response.body)['access_token'];
+      final response = await postUrl(url2, body);
+      response.match(onSuccess: (body) {
+        accessToken = jsonDecode(body)['access_token'];
+      }, onError: (error) {
+        _logger.severe('Error doing OAUth processing: $error');
+      });
     } catch (e) {
       _logger.severe('Exception while Doing OAuth Process: $e');
       return buildErrorResult(