Load profile information on startup

moneymgr_mobile/lib/services/api/auth_api.dart

@@ -1,10 +1,12 @@
 // ignore_for_file: non_constant_identifier_names
 
 import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:logging/logging.dart';
 import 'package:moneymgr_mobile/services/api/api_client.dart';
+import 'package:moneymgr_mobile/services/storage/prefs.dart';
 
-part 'auth_api.g.dart';
 part 'auth_api.freezed.dart';
+part 'auth_api.g.dart';
 
 @freezed
 abstract class AuthInfo with _$AuthInfo {
@@ -27,4 +29,24 @@ extension AuthApi on ApiClient {
     final response = await execute("/auth/info", method: "GET");
     return AuthInfo.fromJson(response.data);
   }
+
+  /// Get authentication information, returning cached information in case of failure
+  Future<AuthInfo> authInfoOrCache() async {
+    try {
+      final config = await authInfo();
+      this.prefs.setAuthInfo(config);
+      return config;
+    } catch (e, s) {
+      Logger.root.warning("Failed to fetch user information! $e $s");
+    }
+
+    final cached = this.prefs.authInfo();
+    if (cached == null) {
+      throw Exception(
+        "Could not fetch user information, cached version is unavailable!",
+      );
+    }
+    return cached;
+  }
+
 }