more refactors

mobile-v2/lib/domain/interfaces/api/authentication_api.interface.dart

@@ -0,0 +1,10 @@
+abstract interface class IAuthenticationApiRepository {
+  /// Returns the access token on successful login
+  Future<String?> login(String email, String password);
+
+  /// Returns the OAuth URL
+  Future<String?> startOAuth({required String redirectUri});
+
+  /// Returns the access token on successful oauth login
+  Future<String?> finishOAuth(String url);
+}