diff --git a/fastapi_jwt/jwt.py b/fastapi_jwt/jwt.py
index d9041ed..6fb430f 100644
--- a/fastapi_jwt/jwt.py
+++ b/fastapi_jwt/jwt.py
@@ -37,14 +37,9 @@ def utcnow():
 ]
 
 
-class JwtAuthorizationCredentials:
-    def __init__(self, subject: Dict[str, Any], jti: Optional[str] = None):
-        self.subject = subject
-        self.jti = jti
-
-    def __getitem__(self, item: str) -> Any:
-        return self.subject[item]
-
+class JwtAuthorizationCredentials(dict):
+    def __init__(self, payload: Dict[str, Any]):
+        super().__init__(payload)
 
 class JwtAuthBase(ABC):
     class JwtAccessCookie(APIKeyCookie):
@@ -75,6 +70,8 @@ def __init__(
         algorithm: str = jwt.ALGORITHMS.HS256,  # type: ignore[attr-defined]
         access_expires_delta: Optional[timedelta] = None,
         refresh_expires_delta: Optional[timedelta] = None,
+        decode_kwargs: Optional[dict] = None,
+        subject_key: Optional[str] = "sub"
     ):
         assert jwt is not None, "python-jose must be installed to use JwtAuth"
         if places:
@@ -93,6 +90,8 @@ def __init__(
         self.algorithm = algorithm
         self.access_expires_delta = access_expires_delta or timedelta(minutes=15)
         self.refresh_expires_delta = refresh_expires_delta or timedelta(days=31)
+        self.decode_kwargs = decode_kwargs
+        self.subject_key = subject_key
 
     @classmethod
     def from_other(
@@ -103,6 +102,8 @@ def from_other(
         algorithm: Optional[str] = None,
         access_expires_delta: Optional[timedelta] = None,
         refresh_expires_delta: Optional[timedelta] = None,
+        decode_kwargs: Optional[dict] = None,
+        subject_key: Optional[str] = "sub"
     ) -> 'JwtAuthBase':
         return cls(
             secret_key=secret_key or other.secret_key,
@@ -110,6 +111,8 @@ def from_other(
             algorithm=algorithm or other.algorithm,
             access_expires_delta=access_expires_delta or other.access_expires_delta,
             refresh_expires_delta=refresh_expires_delta or other.refresh_expires_delta,
+            decode_kwargs=decode_kwargs or other.decode_kwargs,
+            subject_key=subject_key or other.subject_key
         )
 
     def _decode(self, token: str) -> Optional[Dict[str, Any]]:
@@ -119,6 +122,7 @@ def _decode(self, token: str) -> Optional[Dict[str, Any]]:
                 self.secret_key,
                 algorithms=[self.algorithm],
                 options={"leeway": 10},
+                **self.decode_kwargs
             )
             return payload
         except jwt.ExpiredSignatureError as e:  # type: ignore[attr-defined]
@@ -146,7 +150,7 @@ def _generate_payload(
         now = utcnow()
 
         return {
-            "subject": subject.copy(),  # main subject
+            self.subject_key: subject.copy(),  # main subject
             "type": token_type,  # 'access' or 'refresh' token
             "exp": now + expires_delta,  # expire time
             "iat": now,  # creation time
@@ -264,6 +268,7 @@ def __init__(
         algorithm: str = jwt.ALGORITHMS.HS256,  # type: ignore[attr-defined]
         access_expires_delta: Optional[timedelta] = None,
         refresh_expires_delta: Optional[timedelta] = None,
+        subject_key: Optional[str] = "sub"
     ):
         super().__init__(
             secret_key,
@@ -283,7 +288,7 @@ async def _get_credentials(
 
         if payload:
             return JwtAuthorizationCredentials(
-                payload["subject"], payload.get("jti", None)
+                payload
             )
         return None
 
@@ -296,6 +301,7 @@ def __init__(
         algorithm: str = jwt.ALGORITHMS.HS256,  # type: ignore[attr-defined]
         access_expires_delta: Optional[timedelta] = None,
         refresh_expires_delta: Optional[timedelta] = None,
+        decode_kwargs: Optional[dict] = None
     ):
         super().__init__(
             secret_key=secret_key,
@@ -303,8 +309,9 @@ def __init__(
             auto_error=auto_error,
             algorithm=algorithm,
             access_expires_delta=access_expires_delta,
-            refresh_expires_delta=refresh_expires_delta,
+            refresh_expires_delta=refresh_expires_delta
         )
+        self.decode_kwargs = decode_kwargs
 
     async def __call__(
         self, bearer: JwtAuthBase.JwtAccessBearer = Security(JwtAccess._bearer)
@@ -405,7 +412,7 @@ async def _get_credentials(
                 return None
 
         return JwtAuthorizationCredentials(
-            payload["subject"], payload.get("jti", None)
+            payload[self.subject_key], payload.get("jti", None)
         )