Index users by ID instead of name (#156)

* Index users by ID instead of name

Author: Roach

slackclient/_server.py

@@ -151,8 +151,8 @@ def websocket_safe_read(self):
                 raise
             return data.rstrip()
 
-    def attach_user(self, name, channel_id, real_name, tz):
-        self.users.update({name: User(self, name, channel_id, real_name, tz)})
+    def attach_user(self, name, user_id, real_name, tz):
+        self.users.update({user_id: User(self, name, user_id, real_name, tz)})
 
     def attach_channel(self, name, channel_id, members=None):
         if members is None:

slackclient/_util.py

@@ -19,12 +19,12 @@ def find(self, name):
 
 class SearchDict(dict):
     def find(self, search_string):
-        # Find the user by name
+        # Find the user by ID
         user = self.get(search_string)
         if user:
             return user
         else:
-            # If the user can't be found by name, try searching by ID
-            for name, user in self.items():
-                if str(user.id) == search_string:
+            # If the user can't be found by ID, try searching by name
+            for id, user in self.items():
+                if str(user.name) == search_string:
                     return user