add mechanisms attribute during fetching

lib/puppet/provider/mongodb_user/mongodb.rb

@@ -23,17 +23,19 @@ def self.instances
         Puppet.debug("Fetching user  #{user}")
         db = if user['db'] == '$external'
                # For external users, we need to retreive the original DB name from here.
-               user['customData']['createdBy'][%r{.*on db (.*)'\]$}, 1]
+               user['customData']['createdBy'][%r{.* (.*)'\]$}, 1]
              else
                user['db']
              end
-        new(name: user['_id'],
+        u = new(name: user['_id'],
             ensure: :present,
             username: user['user'],
             database: db,
             roles: from_roles(user['roles'], db),
             password_hash: user['credentials']['MONGODB-CR'],
             scram_credentials: user['credentials']['SCRAM-SHA-1'])
+        Puppet.debug("Fetching users, creating the found resources: #{u}")
+        u
       end
     else
       Puppet.warning 'User info is available only from master host'
@@ -57,6 +59,7 @@ def create
       password_hash = @resource[:password_hash]
       password_hash = Puppet::Util::MongodbMd5er.md5(@resource[:username], @resource[:password]) if !password_hash && @resource[:password]
 
+
       command = {
         createUser: @resource[:username],
         customData: {
@@ -88,8 +91,6 @@ def create
         Puppet.debug("Creating user for with command #{command}")
         mongo_eval("db.runCommand(#{command.to_json})", @resource[:database])
       end
-    else
-      Puppet.warning 'User creation is available only from master host'
 
       @property_hash[:ensure] = :present
       @property_hash[:username] = @resource[:username]
@@ -98,6 +99,9 @@ def create
       @property_hash[:roles] = @resource[:roles]
 
       exists?
+
+    else
+      Puppet.warning 'User creation is available only from master host'
     end
   end