Move Member.permissions_in to User.permissions_in.

discord/user.py

@@ -86,3 +86,19 @@ class User:
         """Returns a string that allows you to mention the given user."""
         return '<@{0.id}>'.format(self)
 
+    def permissions_in(self, channel):
+        """An alias for :meth:`Channel.permissions_for`.
+
+        Basically equivalent to:
+
+        .. code-block:: python
+
+            channel.permissions_for(self)
+
+        Parameters
+        -----------
+        channel
+            The channel to check your permissions for.
+        """
+        return channel.permissions_for(self)
+