look at my working example of oauth2 and zettle :)))))

test_request/test_request.py

@@ -1,2 +1,42 @@
-import request
 import json
+from requests_oauthlib import OAuth2Session
+
+access_file = "access_2.json"
+with open(access_file) as f:
+    access_cred = json.load(f)
+    f.close()
+
+client_id = access_cred['client_id']
+client_secret = access_cred['client_secret']
+redirect_uri="https://httpbin.org/get"
+
+url = "https://purchase.izettle.com/purchases/v2"
+
+authorization_base_url = "https://oauth.zettle.com/authorize"
+token_url = "https://oauth.zettle.com/token"
+scope = ["READ:PURCHASE"]
+
+zettle = OAuth2Session(client_id, 
+        scope=scope, 
+        redirect_uri=redirect_uri)
+
+authrization_url, state = zettle.authorization_url(authorization_base_url)
+
+print(authrization_url, state)
+
+redirect_response = input()
+
+print(client_id)
+
+ret = zettle.fetch_token(token_url,
+        include_client_id=True, 
+        client_secret=client_secret, 
+        authorization_response=redirect_response
+    )
+
+r = zettle.get("https://purchase.izettle.com/purchases/v2?limit=50&descending=true")
+print(r)
+
+
+
+