added client token login

lib/services/api/authentication_api.dart

@@ -25,11 +25,15 @@ class AuthenticationAPI {
     return response;
   }
 
-  static Future<bool> signUp({required SignUpModel model}) async {
+  static Future<bool> signUp({
+    required SignUpModel model,
+    required String accessToken,
+  }) async {
     final response = await HTTPService().post(
         path: ApiEndpoints.signUp,
         body: model.toJson(),
         showServerMessage: false,
+        accessToken: accessToken,
         expectedResponseModel: (json) => json['statusCode'] == 201);
     return response;
   }
@@ -63,4 +67,20 @@ class AuthenticationAPI {
         expectedResponseModel: (json) => json['data']);
     return response;
   }
+
+  static Future<Map<String, dynamic>> fetchClientToken({
+    required String clientId,
+    required String clientSecret,
+  }) async {
+    final response = await HTTPService().post(
+      path: ApiEndpoints.clientLogin,
+      body: {
+        'clientId': clientId,
+        'clientSecret': clientSecret,
+      },
+      showServerMessage: false,
+      expectedResponseModel: (json) => json['data'],
+    );
+    return response;
+  }
 }