diff --git a/src/baby_monitor/repositories/dependencies/get_token_repository.py b/src/baby_monitor/repositories/dependencies/get_token_repository.py
index a90de0d..c3ba3e6 100644
--- a/src/baby_monitor/repositories/dependencies/get_token_repository.py
+++ b/src/baby_monitor/repositories/dependencies/get_token_repository.py
@@ -6,7 +6,7 @@ import logging
 from baby_monitor.repositories.interfaces import (
     TokenRepositoryInterface,
 )
-from baby_monitor.repositories.token.memory_token import (
+from baby_monitor.repositories.token import (
     InMemoryTokenRepository,
 )
 
@@ -43,7 +43,7 @@ def _initialize_token_repository() -> TokenRepositoryInterface:
         ) from e
 
     try:
-        from baby_monitor.repositories.token.redis_token import (
+        from baby_monitor.repositories.token import (
             RedisTokenRepository,
         )
 
diff --git a/src/baby_monitor/repositories/token/__init__.py b/src/baby_monitor/repositories/token/__init__.py
new file mode 100644
index 0000000..4fdf8ff
--- /dev/null
+++ b/src/baby_monitor/repositories/token/__init__.py
@@ -0,0 +1,11 @@
+"""Token repository implementations and configurations."""
+
+from .default_ttl import DEFAULT_TTL
+from .memory_token import InMemoryTokenRepository
+from .redis_token import RedisTokenRepository
+
+__all__ = [
+    "DEFAULT_TTL",
+    "InMemoryTokenRepository",
+    "RedisTokenRepository",
+]
diff --git a/src/baby_monitor/repositories/token/default_ttl.py b/src/baby_monitor/repositories/token/default_ttl.py
new file mode 100644
index 0000000..6aa379d
--- /dev/null
+++ b/src/baby_monitor/repositories/token/default_ttl.py
@@ -0,0 +1,3 @@
+"""Definition of Token default TTL."""
+
+DEFAULT_TTL = 28800  # seconds -> 8 hours
diff --git a/src/baby_monitor/repositories/token/memory_token.py b/src/baby_monitor/repositories/token/memory_token.py
index 735ff4d..b45ac5e 100644
--- a/src/baby_monitor/repositories/token/memory_token.py
+++ b/src/baby_monitor/repositories/token/memory_token.py
@@ -3,6 +3,7 @@
 from datetime import datetime, timedelta, UTC
 
 from baby_monitor.repositories.interfaces import TokenRepositoryInterface
+from baby_monitor.repositories.token import DEFAULT_TTL
 
 
 class InMemoryTokenRepository(TokenRepositoryInterface):
@@ -16,9 +17,8 @@ class InMemoryTokenRepository(TokenRepositoryInterface):
     def __init__(self) -> None:
         # token -> (user_id, expiry_time)
         self._tokens: dict[str, tuple[int, datetime]] = {}
-        self._default_ttl = 3600  # Store default TTL for sliding expiration
 
-    def store(self, token: str, user_id: int, ttl: int = 3600) -> None:
+    def store(self, token: str, user_id: int, ttl: int = DEFAULT_TTL) -> None:
         """Store a token with TTL (time to live in seconds)."""
         expiry = datetime.now(UTC) + timedelta(seconds=ttl)
         self._tokens[token] = (user_id, expiry)
@@ -39,7 +39,7 @@ class InMemoryTokenRepository(TokenRepositoryInterface):
             return None
 
         # Sliding expiration: extend the token lifetime
-        new_expiry = datetime.now(UTC) + timedelta(seconds=self._default_ttl)
+        new_expiry = datetime.now(UTC) + timedelta(seconds=DEFAULT_TTL)
         self._tokens[token] = (user_id, new_expiry)
 
         return user_id
diff --git a/src/baby_monitor/repositories/token/redis_token.py b/src/baby_monitor/repositories/token/redis_token.py
index 044c8dd..0ae4b20 100644
--- a/src/baby_monitor/repositories/token/redis_token.py
+++ b/src/baby_monitor/repositories/token/redis_token.py
@@ -3,14 +3,14 @@
 from typing import Any
 
 from baby_monitor.repositories.interfaces import TokenRepositoryInterface
+from baby_monitor.repositories.token import DEFAULT_TTL
 
 
 class RedisTokenRepository(TokenRepositoryInterface):
     """
     Redis-based token storage.
 
-    Requires redis package: pip install redis
-    Set REDIS_URI environment variable (e.g., redis://localhost:6379/0)
+    This implementation uses Redis to store tokens with TTL. Implements sliding expiration.
     """
 
     def __init__(self, redis_client: Any) -> None:
@@ -21,9 +21,8 @@ class RedisTokenRepository(TokenRepositoryInterface):
             redis_client: Redis client instance from redis.from_url()
         """
         self.redis = redis_client
-        self.default_ttl = 3600  # Store default TTL for sliding expiration
 
-    def store(self, token: str, user_id: int, ttl: int = 3600) -> None:
+    def store(self, token: str, user_id: int, ttl: int = DEFAULT_TTL) -> None:
         """Store a token with TTL (time to live in seconds)."""
         key = f"token:{token}"
         self.redis.setex(key, ttl, str(user_id))
@@ -37,7 +36,7 @@ class RedisTokenRepository(TokenRepositoryInterface):
         user_id_str = self.redis.get(key)
         if user_id_str:
             # Sliding expiration: extend the token lifetime
-            self.redis.expire(key, self.default_ttl)
+            self.redis.expire(key, DEFAULT_TTL)
             return int(user_id_str)
         return None