bug fix

Author: Ivan Li

.gitignore

@@ -4,3 +4,4 @@
 Homestead.yaml
 Homestead.json
 .env
+composer.json

database/migrations/2016_05_31_131838_entrust_setup_tables.php

@@ -25,7 +25,7 @@ public function up()
             $table->integer('user_id')->unsigned();
             $table->integer('role_id')->unsigned();
 
-            $table->foreign('user_id')->references('id')->on('')
+            $table->foreign('user_id')->references('id')->on('users')
                 ->onUpdate('cascade')->onDelete('cascade');
             $table->foreign('role_id')->references('id')->on('roles')
                 ->onUpdate('cascade')->onDelete('cascade');