create auth alias to be consistent with mongo JS api

Database/MongoDB.hs

@@ -36,7 +36,7 @@ module Database.MongoDB
      ColCreateOpt(..),
      collectionNames, createCollection, dropCollection,
      renameCollection, runCommand, validateCollection,
-     login, addUser,
+     authenticate, login, addUser,
      -- * Collection
      Collection, FieldSelector, FullCollection,
      NumToSkip, NumToReturn, Selector,
@@ -564,6 +564,9 @@ login c db user pass = do
                            ("key", toBson digest)]
       in runCommand c db request
 
+authenticate :: Connection -> Database -> Username -> Password -> IO BsonDoc
+authenticate = login
+
 -- | create a new user in the current /Database/
 addUser :: Connection -> Database -> Username -> Password -> IO BsonDoc
 addUser c db user pass = do

TODO

@@ -15,7 +15,6 @@ BSON
 MongoDB
 -------
 + support full level 0
-  - database command support ??
   - handle query errors
   - hint, explain, $where
   - database profiling: set/get profiling level, get profiling info
@@ -24,7 +23,6 @@ MongoDB
     * getName
     * getCollection
     * add_son_manipulators
-    * authenticate
     * dereference (dbref)
     * error
     * eval