Adding generic requests method

main.py

@@ -25,16 +25,26 @@ class PortainerClient:
             "X-API-Key": self.access_token
         }
 
-    def list_stacks(self):
-        response = requests.get(f"{self.api_url}/stacks", headers=self._get_headers())
+    def _get(self, uri):
+        response = requests.get(f"{self.api_url}/{uri}", headers=self._get_headers())
         return response.json()
 
+    def list_stacks(self):
+        return self._get('stacks')
+
     def get_stack(self, stack_id):
-        response = requests.get(f"{self.api_url}/stacks/{stack_id}", headers=self._get_headers())
-        return response.json()
+        return self._get(f'stacks/{stack_id}')
 
     def get_stack_file(self, stack_id):
-        response = requests.get(f"{self.api_url}/stacks/{stack_id}/file", headers=self._get_headers())
+        return self._get(f'stacks/{stack_id}/file')
+
+    def _put(self, uri, payload):
+        response = requests.put(
+            f"{self.api_url}/uri",
+            headers=self._get_headers(),
+            json=payload
+        )
+
         return response.json()
 
     def upgrade_stack(self, stack):
@@ -45,22 +55,12 @@ class PortainerClient:
             "StackFileContent": file_response["StackFileContent"],
             "Env": stack["Env"]
         }
-        response = requests.put(
-            f"{self.api_url}/stacks/{stack['Id']}?endpointId={stack['EndpointId']}",
-            headers=self._get_headers(),
-            json=payload
-        )
 
-        return response.json()
+        return self._put(f"stacks/{stack['Id']}?endpointId={stack['EndpointId']}", payload)
 
     def list_stack_containers(self, endpoint, stack_name):
         filters = '{"label":["com.docker.compose.project=' + stack_name + '"]}'
-        response = requests.get(
-            f"{self.api_url}/endpoints/{endpoint}/docker/containers/json?all=1&filters={filters}",
-            headers=self._get_headers()
-        )
-
-        return response.json()
+        return self._get(f'endpoints/{endpoint}/docker/containers/json?all=1&filters={filters}')
 
     def update_image(self, endpoint, image):
         response = requests.post(