moved subscriptions to Account method

Author: alejcas

O365/account.py

@@ -2,18 +2,16 @@
 from typing import Callable, List, Optional, Tuple, Type
 
 from .connection import Connection, MSGraphProtocol, Protocol
-from .subscriptions import Subscriptions
 from .utils import ME_RESOURCE, consent_input_token
 
 
-class Account:
-    connection_constructor: Type = Connection  #: :meta private:
-    subscriptions_constructor: Type = Subscriptions
-
-    def __init__(self, credentials: Tuple[str, str], *,
-                 username: Optional[str] = None,
-                 protocol: Optional[Protocol] = None,
-                 main_resource: Optional[str] = None, **kwargs):
+class Account:
+    connection_constructor: Type = Connection  #: :meta private:
+
+    def __init__(self, credentials: Tuple[str, str], *,
+                 username: Optional[str] = None,
+                 protocol: Optional[Protocol] = None,
+                 main_resource: Optional[str] = None, **kwargs):
         """ Creates an object which is used to access resources related to the specified credentials.
 
         :param credentials: a tuple containing the client_id and client_secret
@@ -62,7 +60,6 @@ def __init__(self, credentials: Tuple[str, str], *,
         self.con = self.connection_constructor(credentials, **kwargs)
         #: The resource in use for the account. |br| **Type:** str
         self.main_resource: str = main_resource or self.protocol.default_resource
-        self.subscriptions = self.subscriptions_constructor(parent=self)
 
     def __repr__(self):
         if self.con.auth:
@@ -369,3 +366,9 @@ def groups(self, *, resource: str = ''):
 
         from .groups import Groups
         return Groups(parent=self, main_resource=resource)
+
+    def subscriptions(self, *, resource: str = ''):
+        """ Get an instance to manage MS Graph subscriptions """
+
+        from .subscriptions import Subscriptions
+        return Subscriptions(parent=self, main_resource=resource)

O365/mailbox.py

@@ -1069,4 +1069,4 @@ def get_settings(self):
 
         return self.mailbox_settings_constructor(
             parent=self, **{self._cloud_data_key: data}
-        )
+        )