diff --git a/fastanime/cli/auth/__init__.py b/fastanime/cli/auth/__init__.py
index 5270aa7..8b13789 100644
--- a/fastanime/cli/auth/__init__.py
+++ b/fastanime/cli/auth/__init__.py
@@ -1,79 +1 @@
-# In fastanime/cli/auth/manager.py
-from __future__ import annotations
 
-import json
-import logging
-from typing import TYPE_CHECKING, Optional
-
-from ...core.exceptions import ConfigError
-from ..constants import USER_DATA_PATH
-
-if TYPE_CHECKING:
-    from ...libs.api.types import UserProfile
-
-logger = logging.getLogger(__name__)
-
-
-class CredentialsManager:
-    """
-    Handles loading and saving of user credentials and profile data.
-
-    This class abstracts the storage mechanism (currently a JSON file),
-    allowing for future changes (e.g., to a system keyring) without
-    affecting the rest of the application.
-    """
-
-    def __init__(self):
-        """Initializes the manager with the path to the user data file."""
-        self.path = USER_DATA_PATH
-
-    def load_user_profile(self) -> Optional[dict]:
-        """
-        Loads the user profile data from the JSON file.
-
-        Returns:
-            A dictionary containing user data, or None if the file doesn't exist
-            or is invalid.
-        """
-        if not self.path.exists():
-            return None
-        try:
-            with self.path.open("r", encoding="utf-8") as f:
-                return json.load(f)
-        except (json.JSONDecodeError, IOError) as e:
-            logger.error(f"Failed to load user credentials from {self.path}: {e}")
-            return None
-
-    def save_user_profile(self, profile: UserProfile, token: str) -> None:
-        """
-        Saves the user profile and token to the JSON file.
-
-        Args:
-            profile: The generic UserProfile dataclass.
-            token: The authentication token string.
-        """
-        user_data = {
-            "id": profile.id,
-            "name": profile.name,
-            "bannerImage": profile.banner_url,
-            "avatar": {"large": profile.avatar_url},
-            "token": token,
-        }
-        try:
-            self.path.parent.mkdir(parents=True, exist_ok=True)
-            with self.path.open("w", encoding="utf-8") as f:
-                json.dump(user_data, f, indent=2)
-            logger.info(f"Successfully saved user credentials to {self.path}")
-        except IOError as e:
-            raise ConfigError(f"Could not save user credentials to {self.path}: {e}")
-
-    def clear_user_profile(self) -> None:
-        """Deletes the user credentials file."""
-        if self.path.exists():
-            try:
-                self.path.unlink()
-                logger.info("Cleared user credentials.")
-            except IOError as e:
-                raise ConfigError(
-                    f"Could not clear user credentials at {self.path}: {e}"
-                )
diff --git a/fastanime/cli/auth/manager.py b/fastanime/cli/auth/manager.py
new file mode 100644
index 0000000..ae8b0f7
--- /dev/null
+++ b/fastanime/cli/auth/manager.py
@@ -0,0 +1,80 @@
+import json
+import logging
+from typing import TYPE_CHECKING, Optional
+
+from ...core.constants import USER_DATA_PATH
+from ...core.exceptions import ConfigError
+
+if TYPE_CHECKING:
+    from ...libs.api.types import UserProfile
+
+logger = logging.getLogger(__name__)
+
+
+class AuthManager:
+    """
+    Handles loading, saving, and clearing of user credentials and profile data.
+
+    This class abstracts the storage mechanism (currently a JSON file), allowing
+    for future changes (e.g., to a system keyring) without affecting the rest
+    of the application.
+    """
+
+    def __init__(self):
+        """Initializes the manager with the path to the user data file."""
+        self.path = USER_DATA_PATH
+
+    def load_user_profile(self) -> Optional[dict]:
+        """
+        Loads the user profile data from the JSON file.
+
+        Returns:
+            A dictionary containing user data, or None if the file doesn't exist
+            or is invalid.
+        """
+        if not self.path.exists():
+            return None
+        try:
+            with self.path.open("r", encoding="utf-8") as f:
+                # We return the raw dict here. The API client will validate it.
+                return json.load(f)
+        except (json.JSONDecodeError, IOError) as e:
+            logger.error(f"Failed to load user credentials from {self.path}: {e}")
+            # If the file is corrupt, it's safer to treat it as non-existent.
+            return None
+
+    def save_user_profile(self, profile: UserProfile, token: str) -> None:
+        """
+        Saves the user profile and token to the JSON file.
+
+        Args:
+            profile: The generic UserProfile dataclass from the API client.
+            token: The authentication token string.
+        """
+        # This structure matches the old format for backward compatibility
+        # and for the AniListApi to re-authenticate from storage.
+        user_data = {
+            "id": profile.id,
+            "name": profile.name,
+            "bannerImage": profile.banner_url,
+            "avatar": {"large": profile.avatar_url, "medium": profile.avatar_url},
+            "token": token,
+        }
+        try:
+            self.path.parent.mkdir(parents=True, exist_ok=True)
+            with self.path.open("w", encoding="utf-8") as f:
+                json.dump(user_data, f, indent=2)
+            logger.info(f"Successfully saved user credentials to {self.path}")
+        except IOError as e:
+            raise ConfigError(f"Could not save user credentials to {self.path}: {e}")
+
+    def clear_user_profile(self) -> None:
+        """Deletes the user credentials file."""
+        if self.path.exists():
+            try:
+                self.path.unlink()
+                logger.info("Cleared user credentials.")
+            except IOError as e:
+                raise ConfigError(
+                    f"Could not clear user credentials at {self.path}: {e}"
+                )