docs: OAuth server section and Sign in with your product guide

[atharvadeosthale]

OAuth server documentation

Adds a new OAuth server section under Partners, covering Appwrite's OAuth 2.1 / OpenID Connect provider capability: turning a project into an OAuth provider so third-party apps can "Sign in with your product".

Reference and concept pages

Under docs/partners/oauth-server:

• Overview — what the OAuth server is and how the pieces fit together
• Quick start — enable the server, register a client, run a first sign-in
• Clients — confidential vs public clients, secrets, and management
• Authorization — the authorization code flow, PKCE, and hosting a consent screen
• Tokens — access, refresh, and ID tokens, lifetimes, introspection, and revocation
• Scopes — the built-in OpenID scopes and custom scopes
• Device flow — the device authorization grant for TVs and CLIs

Code samples cover all supported client and server SDKs alongside raw HTTP.

Guide: Sign in with your product

A step-by-step tutorial that builds a complete "Sign in with your product" experience end to end with TanStack Start: a provider that hosts the consent screen and a consumer that adds the sign-in button and exchanges the code for tokens server-side.

The finished code lives in a companion repository: appwrite-community/oauth-guide-taskflow.

Notes

• New OAuth server entry added to the Partners group in the docs sidebar.
• Screenshots captured in both light and dark themes and optimized to AVIF.

Opened as a draft against projects-api.

[appwrite]

Appwrite Website

Project ID: 69d7efb00023389e8d27

Sites (1)

Site	Status	Logs	Preview	QR
website 69d7f2670014e24571ca	Ready	View Logs	Preview URL

Website (appwrite/website)

Project ID: 684969cb000a2f6c0a02

Sites (1)

Site	Status	Logs	Preview	QR
website 68496a17000f03d62013	Queued	View Logs	Preview URL

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