fixed typing acording to #1200

Author: alejcas

O365/utils/token.py

@@ -21,9 +21,9 @@
 class CryptographyManagerType(Protocol):
     """Abstract cryptography manager"""
 
-    def encrypt(self, data: str) -> bytes: ...
+    def encrypt(self, data: Union[bytes, str]) -> Union[bytes, str]: ...
 
-    def decrypt(self, data: bytes) -> str: ...
+    def decrypt(self, data: Union[bytes, str]) -> Union[bytes, str]: ...
 
 
 class BaseTokenBackend(TokenCache):