diff --git a/keycloak/keycloak_openid.py b/keycloak/keycloak_openid.py
index ebd469f..61703e7 100644
--- a/keycloak/keycloak_openid.py
+++ b/keycloak/keycloak_openid.py
@@ -162,7 +162,7 @@ class KeycloakOpenID:
                        "redirect-uri": redirect_uri}
         return URL_AUTH.format(**params_path)
 
-    def token(self, username="", password="", grant_type=["password"], code="", redirect_uri="", totp=None):
+    def token(self, username="", password="", grant_type=["password"], code="", redirect_uri="", totp=None, **extra):
         """
         The token endpoint is used to obtain tokens. Tokens can either be obtained by
         exchanging an authorization code or by supplying credentials directly depending on
@@ -183,6 +183,8 @@ class KeycloakOpenID:
         payload = {"username": username, "password": password,
                    "client_id": self.client_id, "grant_type": grant_type,
                    "code": code, "redirect_uri": redirect_uri}
+        if payload:
+            payload.update(extra)
 
         if totp:
             payload["totp"] = totp