> For the complete documentation index, see [llms.txt](https://doc.thordata.com/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.thordata.com/doc/proxies/datacenter-proxies/username-password-authentication.md).

# Username-Password Authentication

##  Registration and Login

1. Visit the official Thordata website.
2. Complete the registration process for a new account.
3. Log in to the system using your account credentials.

<figure><img src="/files/wMa93L3RtGzm8CaH4YBc" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/m1FRhYm7pTdpmPx9IU7U" alt=""><figcaption></figcaption></figure>

## Purchase a Plan

After logging in, locate the "Datacenter Proxies" service in the user dashboard and select a suitable plan for purchase.

**Explanation of Plan Types**

* **Shared Proxies**: Billed based on traffic (in GB), with IP resources shared among multiple users.
* **Dedicated Proxies**: Billed according to the number of IPs and usage duration, with IP resources exclusively for your use.

<figure><img src="/files/rVTxXfIAvmfuoCvFsEj2" alt=""><figcaption></figcaption></figure>

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