Add token vault subject_token_type access_token to fast api sdk

README.md

@@ -134,6 +134,34 @@ def test_public_route():
 
 </details>
 
+### 5. Get an access token for a connection
+
+If you need to get an access token for an upstream idp via a connection, you can use the `get_access_token_for_connection` method on the underlying api_client:
+
+```python
+import asyncio
+
+from auth0_fastapi_api import Auth0FastAPI
+
+async def main():
+    auth0 = Auth0FastAPI(
+        domain="<AUTH0_DOMAIN>",
+        audience="<AUTH0_AUDIENCE>",
+        client_id="<AUTH0_CLIENT_ID>",
+        client_secret="<AUTH0_CLIENT_SECRET>",
+    )
+    connection = "my-connection" # The Auth0 connection to the upstream idp
+    access_token = "..." # The Auth0 access token to exchange
+
+    connection_access_token = await auth0.api_client.get_access_token_for_connection({"connection": connection, "access_token": access_token})
+    # The returned token is the access token for the upstream idp
+    print(connection_access_token)
+
+asyncio.run(main())
+```
+
+More info https://auth0.com/docs/secure/tokens/token-vault
+
 ## Feedback
 
 ### Contributing

fastapi_plugin/fast_api_client.py

@@ -13,7 +13,7 @@ class Auth0FastAPI:
     mirroring the concept from TypeScript's Fastify plugin.
     """
 
-    def __init__(self, domain: str, audience: str, custom_fetch=None):
+    def __init__(self, domain: str, audience: str, client_id=None, client_secret=None, custom_fetch=None):
         """
         domain: Your Auth0 domain (like 'my-tenant.us.auth0.com')
         audience: API identifier from the Auth0 Dashboard
@@ -25,7 +25,7 @@ def __init__(self, domain: str, audience: str, custom_fetch=None):
             raise ValueError("audience is required.")
 
         self.api_client = ApiClient(
-            ApiClientOptions(domain=domain, audience=audience, custom_fetch=custom_fetch)
+            ApiClientOptions(domain=domain, audience=audience, client_id=client_id, client_secret=client_secret, custom_fetch=custom_fetch)
         )
 
     def require_auth(