We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Add logging for OAuth flows
We merged the basic implementation in #414, but neglected to include any additional logging around the new flows/logic.

Some ideas of what we should log:

- [x] The `OAUTH_CLIENT_NAME` used
- [x] The `redirect_uri` sent to the authorization server with the `authorize_redirect` request
- [x] If an access token fails to be authorized

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `benefits/oauth/views.py`
Content:
```
1 from django.shortcuts import redirect
2 from django.urls import reverse
3 
4 from authlib.integrations.django_client import OAuth
5 
6 from benefits.core import session
7 from benefits.settings import OAUTH_CLIENT_NAME
8 
9 
10 if OAUTH_CLIENT_NAME:
11     _oauth = OAuth()
12     _oauth.register(OAUTH_CLIENT_NAME)
13     oauth_client = _oauth.create_client(OAUTH_CLIENT_NAME)
14 
15 
16 ROUTE_AUTH = "oauth:authorize"
17 ROUTE_START = "eligibility:start"
18 ROUTE_CONFIRM = "eligibility:confirm"
19 
20 
21 def login(request):
22     if not oauth_client:
23         raise Exception("No OAuth client")
24 
25     route = reverse(ROUTE_AUTH)
26     redirect_uri = request.build_absolute_uri(route)
27 
28     return oauth_client.authorize_redirect(request, redirect_uri)
29 
30 
31 def authorize(request):
32     if not oauth_client:
33         raise Exception("No OAuth client")
34 
35     token = oauth_client.authorize_access_token(request)
36 
37     if token is None:
38         return redirect(ROUTE_START)
39     else:
40         # we are intentionally not storing anything about the user, including their token
41         session.update(request, auth=True)
42         return redirect(ROUTE_CONFIRM)
43
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/benefits/oauth/views.py b/benefits/oauth/views.py
--- a/benefits/oauth/views.py
+++ b/benefits/oauth/views.py
@@ -1,3 +1,5 @@
+import logging
+
 from django.shortcuts import redirect
 from django.urls import reverse
 
@@ -7,7 +9,12 @@
 from benefits.settings import OAUTH_CLIENT_NAME
 
 
+logger = logging.getLogger(__name__)
+
+
 if OAUTH_CLIENT_NAME:
+    logger.debug(f"Using OAuth client configuration: {OAUTH_CLIENT_NAME}")
+
     _oauth = OAuth()
     _oauth.register(OAUTH_CLIENT_NAME)
     oauth_client = _oauth.create_client(OAUTH_CLIENT_NAME)
@@ -25,6 +32,8 @@
     route = reverse(ROUTE_AUTH)
     redirect_uri = request.build_absolute_uri(route)
 
+    logger.debug(f"OAuth authorize_redirect with redirect_uri: {redirect_uri}")
+
     return oauth_client.authorize_redirect(request, redirect_uri)
 
 
@@ -32,11 +41,14 @@
     if not oauth_client:
         raise Exception("No OAuth client")
 
+    logger.debug("Attempting to authorize OAuth access token")
     token = oauth_client.authorize_access_token(request)
 
     if token is None:
+        logger.warning("Could not authorize OAuth access token")
         return redirect(ROUTE_START)
     else:
         # we are intentionally not storing anything about the user, including their token
+        logger.debug("OAuth access token authorized")
         session.update(request, auth=True)
         return redirect(ROUTE_CONFIRM)

{"golden_diff": "diff --git a/benefits/oauth/views.py b/benefits/oauth/views.py\n--- a/benefits/oauth/views.py\n+++ b/benefits/oauth/views.py\n@@ -1,3 +1,5 @@\n+import logging\n+\n from django.shortcuts import redirect\n from django.urls import reverse\n \n@@ -7,7 +9,12 @@\n from benefits.settings import OAUTH_CLIENT_NAME\n \n \n+logger = logging.getLogger(__name__)\n+\n+\n if OAUTH_CLIENT_NAME:\n+    logger.debug(f\"Using OAuth client configuration: {OAUTH_CLIENT_NAME}\")\n+\n     _oauth = OAuth()\n     _oauth.register(OAUTH_CLIENT_NAME)\n     oauth_client = _oauth.create_client(OAUTH_CLIENT_NAME)\n@@ -25,6 +32,8 @@\n     route = reverse(ROUTE_AUTH)\n     redirect_uri = request.build_absolute_uri(route)\n \n+    logger.debug(f\"OAuth authorize_redirect with redirect_uri: {redirect_uri}\")\n+\n     return oauth_client.authorize_redirect(request, redirect_uri)\n \n \n@@ -32,11 +41,14 @@\n     if not oauth_client:\n         raise Exception(\"No OAuth client\")\n \n+    logger.debug(\"Attempting to authorize OAuth access token\")\n     token = oauth_client.authorize_access_token(request)\n \n     if token is None:\n+        logger.warning(\"Could not authorize OAuth access token\")\n         return redirect(ROUTE_START)\n     else:\n         # we are intentionally not storing anything about the user, including their token\n+        logger.debug(\"OAuth access token authorized\")\n         session.update(request, auth=True)\n         return redirect(ROUTE_CONFIRM)\n", "issue": "Add logging for OAuth flows\nWe merged the basic implementation in #414, but neglected to include any additional logging around the new flows/logic.\r\n\r\nSome ideas of what we should log:\r\n\r\n- [x] The `OAUTH_CLIENT_NAME` used\r\n- [x] The `redirect_uri` sent to the authorization server with the `authorize_redirect` request\r\n- [x] If an access token fails to be authorized\n", "before_files": [{"content": "from django.shortcuts import redirect\nfrom django.urls import reverse\n\nfrom authlib.integrations.django_client import OAuth\n\nfrom benefits.core import session\nfrom benefits.settings import OAUTH_CLIENT_NAME\n\n\nif OAUTH_CLIENT_NAME:\n    _oauth = OAuth()\n    _oauth.register(OAUTH_CLIENT_NAME)\n    oauth_client = _oauth.create_client(OAUTH_CLIENT_NAME)\n\n\nROUTE_AUTH = \"oauth:authorize\"\nROUTE_START = \"eligibility:start\"\nROUTE_CONFIRM = \"eligibility:confirm\"\n\n\ndef login(request):\n    if not oauth_client:\n        raise Exception(\"No OAuth client\")\n\n    route = reverse(ROUTE_AUTH)\n    redirect_uri = request.build_absolute_uri(route)\n\n    return oauth_client.authorize_redirect(request, redirect_uri)\n\n\ndef authorize(request):\n    if not oauth_client:\n        raise Exception(\"No OAuth client\")\n\n    token = oauth_client.authorize_access_token(request)\n\n    if token is None:\n        return redirect(ROUTE_START)\n    else:\n        # we are intentionally not storing anything about the user, including their token\n        session.update(request, auth=True)\n        return redirect(ROUTE_CONFIRM)\n", "path": "benefits/oauth/views.py"}], "after_files": [{"content": "import logging\n\nfrom django.shortcuts import redirect\nfrom django.urls import reverse\n\nfrom authlib.integrations.django_client import OAuth\n\nfrom benefits.core import session\nfrom benefits.settings import OAUTH_CLIENT_NAME\n\n\nlogger = logging.getLogger(__name__)\n\n\nif OAUTH_CLIENT_NAME:\n    logger.debug(f\"Using OAuth client configuration: {OAUTH_CLIENT_NAME}\")\n\n    _oauth = OAuth()\n    _oauth.register(OAUTH_CLIENT_NAME)\n    oauth_client = _oauth.create_client(OAUTH_CLIENT_NAME)\n\n\nROUTE_AUTH = \"oauth:authorize\"\nROUTE_START = \"eligibility:start\"\nROUTE_CONFIRM = \"eligibility:confirm\"\n\n\ndef login(request):\n    if not oauth_client:\n        raise Exception(\"No OAuth client\")\n\n    route = reverse(ROUTE_AUTH)\n    redirect_uri = request.build_absolute_uri(route)\n\n    logger.debug(f\"OAuth authorize_redirect with redirect_uri: {redirect_uri}\")\n\n    return oauth_client.authorize_redirect(request, redirect_uri)\n\n\ndef authorize(request):\n    if not oauth_client:\n        raise Exception(\"No OAuth client\")\n\n    logger.debug(\"Attempting to authorize OAuth access token\")\n    token = oauth_client.authorize_access_token(request)\n\n    if token is None:\n        logger.warning(\"Could not authorize OAuth access token\")\n        return redirect(ROUTE_START)\n    else:\n        # we are intentionally not storing anything about the user, including their token\n        logger.debug(\"OAuth access token authorized\")\n        session.update(request, auth=True)\n        return redirect(ROUTE_CONFIRM)\n", "path": "benefits/oauth/views.py"}]}