Added singleton config and changed module structure

neuroapi/_methods/image.py

@@ -0,0 +1,20 @@
+import json
+
+from aiohttp import ClientSession
+
+from .api_method import ApiMethod
+
+
+class Image(ApiMethod):
+    async def add(self, post_id: str, file_id: str, has_spoiler: bool | None, message_id: int):
+        payload = {'post_id': post_id, 'file_id': file_id,
+                   'has_spoiler': has_spoiler, 'message_id': message_id}
+        if has_spoiler is None:
+            payload.pop('has_spoiler')
+        payload = json.dumps(payload)
+        async with ClientSession() as session:
+            response = await session.post(
+                self.api_url+'/image/add', data=payload, headers={'Content-Type': 'application/json'})
+        data = await response.json()
+        if 'statusCode' in data:
+            raise Exception(data['message'])