---
title: Auto-Login with Encoded Credential
slug: kronpam-reference-guide-3-9-0/auto-login-with-encoded-credential
description: Learn the basics of HTTP basic authentication and how servers can request authentication information from clients. Find out how the information is encoded in base-64 format and discover the auto-login feature that allows for replacing patterns with encode
docTags: 
createdAt: 2022-07-28T11:43:29.000Z
---

The HTTP basic authentication is a simple challenge and response mechanism with which a server can request authentication information (a user ID and password) from a client. The client passes the authentication information to the server in an Authorization header. The authentication information is sent in base-64 encoding format.

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To use the auto-login feature in this scenario, the **Login Username Matcher Template **and **Auto Login Password Matcher Template **must have the same value as **CastleAuthorization=Basic%20$$value$$(&|$). **

The **username: password** content will be encoded with Base64 and the matched pattern within the request body will be replaced with the encoded content.

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