diff --git a/src/aiocraft/mc/auth/__init__.py b/src/aiocraft/mc/auth/__init__.py
index 3416833..e51c27c 100644
--- a/src/aiocraft/mc/auth/__init__.py
+++ b/src/aiocraft/mc/auth/__init__.py
@@ -1,3 +1,3 @@
 from .interface import AuthException, AuthInterface
 from .microsoft import MicrosoftAuthenticator
-from .mojang import MojangToken
+from .mojang import MojangAuthenticator
diff --git a/src/aiocraft/mc/auth/interface.py b/src/aiocraft/mc/auth/interface.py
index caac9ec..f1c2cff 100644
--- a/src/aiocraft/mc/auth/interface.py
+++ b/src/aiocraft/mc/auth/interface.py
@@ -1,10 +1,13 @@
 """Minecraft authentication interface"""
+import logging
 from typing import Optional, Dict, Any
 
 import aiohttp
 
 from ..definitions import GameProfile
 
+logger = logging.getLogger(__file__)
+
 class AuthException(Exception):
 	endpoint : str
 	code     : int
@@ -25,10 +28,19 @@ class AuthInterface:
 	SESSION_SERVER = "https://sessionserver.mojang.com/session/minecraft"
 	TIMEOUT = aiohttp.ClientTimeout(total=3)
 
-	# async def authenticate(self, user:str, pwd:str):
-	# 	raise NotImplementedError
+	async def login(self, *args) -> 'AuthInterface':
+		raise NotImplementedError
 
-	async def refresh(self):
+	async def refresh(self) -> 'AuthInterface':
+		raise NotImplementedError
+
+	async def validate(self) -> 'AuthInterface':
+		raise NotImplementedError
+
+	def serialize(self) -> Dict[str, Any]:
+		raise NotImplementedError
+
+	def deserialize(self, data:Dict[str, Any]) -> 'AuthInterface':
 		raise NotImplementedError
 
 	async def join(self, server_id) -> dict:
@@ -51,18 +63,20 @@ class AuthInterface:
 
 	@classmethod
 	async def _post(cls, endpoint:str, **kwargs) -> Dict[str, Any]:
-		async with aiohttp.ClientSession(timeout=cls.TIMEOUT) as sess:
-			async with sess.post(endpoint, **kwargs) as res:
+		async with aiohttp.ClientSession(timeout=cls.TIMEOUT) as session:
+			async with session.post(endpoint, **kwargs) as res:
 				data = await res.json(content_type=None)
+				logger.debug("POST /%s [%s] : %s", endpoint, str(kwargs), str(data))
 				if res.status >= 400:
 					raise AuthException(endpoint, res.status, data, kwargs)
 				return data
 
 	@classmethod
 	async def _get(cls, endpoint:str, **kwargs) -> Dict[str, Any]:
-		async with aiohttp.ClientSession(timeout=cls.TIMEOUT) as sess:
-			async with sess.get(endpoint, **kwargs) as res:
+		async with aiohttp.ClientSession(timeout=cls.TIMEOUT) as session:
+			async with session.get(endpoint, **kwargs) as res:
 				data = await res.json(content_type=None)
+				logger.debug("GET /%s [%s] : %s", endpoint, str(kwargs), str(data))
 				if res.status >= 400:
 					raise AuthException(endpoint, res.status, data, kwargs)
 				return data
diff --git a/src/aiocraft/mc/auth/microsoft.py b/src/aiocraft/mc/auth/microsoft.py
index 06c5353..2f23d78 100644
--- a/src/aiocraft/mc/auth/microsoft.py
+++ b/src/aiocraft/mc/auth/microsoft.py
@@ -9,7 +9,7 @@ from yarl import URL
 import aiohttp
 
 from ..definitions import GameProfile
-from .interface import AuthInterface
+from .interface import AuthInterface, AuthException
 
 class InvalidStateError(Exception):
 	pass
diff --git a/src/aiocraft/mc/auth/mojang.py b/src/aiocraft/mc/auth/mojang.py
index 80a6b33..b1d3317 100644
--- a/src/aiocraft/mc/auth/mojang.py
+++ b/src/aiocraft/mc/auth/mojang.py
@@ -12,7 +12,7 @@ from .interface import AuthInterface
 from ..definitions import GameProfile
 
 @dataclass
-class MojangToken(AuthInterface):
+class MojangAuthenticator(AuthInterface):
 	username : str
 	accessToken : str
 	clientToken : str
@@ -24,6 +24,9 @@ class MojangToken(AuthInterface):
 	CONTENT_TYPE = "application/json"
 	HEADERS = {"content-type": CONTENT_TYPE}
 
+	def __init__(self):
+		pass
+
 	def __equals__(self, other) -> bool:
 		if not isinstance(other, self.__class__):
 			return False
@@ -40,7 +43,7 @@ class MojangToken(AuthInterface):
 	def __str__(self) -> str:
 		return repr(self)
 
-	def as_dict(self):
+	def serialize(self):
 		return {
 			"username":self.username,
 			"accessToken":self.accessToken,
@@ -48,26 +51,17 @@ class MojangToken(AuthInterface):
 			"selectedProfile": self.selectedProfile.as_dict(),
 		}
 
-	@classmethod
-	def from_file(cls, fname:str):
-		with open(fname) as f:
-			return cls.from_dict(json.load(f))
+	def deserialize(self, data:dict):
+		self.username=data["username"] if "username" in data else data["selectedProfile"]["name"],
+		self.accessToken=data["accessToken"],
+		self.clientToken=data["clientToken"],
+		self.selectedProfile=GameProfile(**data["selectedProfile"])
 
-	@classmethod
-	def from_dict(cls, data:dict):
-		return cls(
-			username=data["username"] if "username" in data else data["selectedProfile"]["name"],
-			accessToken=data["accessToken"],
-			clientToken=data["clientToken"],
-			selectedProfile=GameProfile(**data["selectedProfile"]),
-		)
-
-	@classmethod
-	async def login(cls, username, password, invalidate=False):
+	async def login(self, username:str, password:str, invalidate=False) -> AuthInterface:
 		payload = {
 			"agent": {
-				"name": cls.AGENT_NAME,
-				"version": cls.AGENT_VERSION
+				"name": self.AGENT_NAME,
+				"version": self.AGENT_VERSION
 			},
 			"username": username,
 			"password": password
@@ -76,14 +70,14 @@ class MojangToken(AuthInterface):
 		if not invalidate:
 			payload["clientToken"] = uuid.uuid4().hex
 
-		res = await cls._post(cls.AUTH_SERVER + "/authenticate", payload)
+		res = await self._post(self.AUTH_SERVER + "/authenticate", payload)
 
-		return cls(
-			username=username,
-			accessToken=res["accessToken"],
-			clientToken=res["clientToken"],
-			selectedProfile=GameProfile(**res["selectedProfile"])
-		)
+		self.username=username,
+		self.accessToken=res["accessToken"],
+		self.clientToken=res["clientToken"],
+		self.selectedProfile=GameProfile(**res["selectedProfile"])
+
+		return self
 
 	@classmethod
 	async def sign_out(cls, username:str, password:str) -> dict:
@@ -113,8 +107,6 @@ class MojangToken(AuthInterface):
 		if "user" in res:
 			self.username = res["user"]["username"]
 
-		return res
-
 	async def validate(self, clientToken:bool = True) -> dict:
 		payload = { "accessToken": self.accessToken }
 		if clientToken: