Update

app/ModelFilters/AdminRoleFilter.php

@@ -6,4 +6,8 @@ use EloquentFilter\ModelFilter;
 
 class AdminRoleFilter extends ModelFilter
 {
+    public function name($name)
+    {
+        return $this->where('name', 'like', '%'.$name.'%');
+    }
 }

app/ModelFilters/AdminUserFilter.php

@@ -6,8 +6,8 @@ use EloquentFilter\ModelFilter;
 
 class AdminUserFilter extends ModelFilter
 {
-    public function name($name)
+    public function username($username)
     {
-        return $this->where('username', 'like', '%'.$name.'%');
+        return $this->where('username', 'like', '%'.$username.'%');
     }
 }