fix: Incorrect configuration information read (#39)

* 读取配置信息问题

读取配置信息键名有问题

* 从配置文件读取

* Update 20181113071924_create_rules_table.php

Author: zhangyue0503

database/migrations/20181113071924_create_rules_table.php

@@ -29,9 +29,10 @@ protected function init()
      */
     protected function getDbConfig(): array
     {
-        $default = config('tauthz.database.connection') ?: config('database.default');
-
-        $config = config("database.connections.{$default}");
+        $default = config('tauthz.default');
+        $connection = config("tauthz.enforcers.{$default}.database.connection") ?: config('database.default');
+        
+        $config = config("database.connections.{$connection}");
 
         if (0 == $config['deploy']) {
             $dbConfig = [