Twitch

Twitch signs users in with their Twitch account — the right connector for streaming tools, overlays, and community products where the channel is the identity.

Copy the redirect URI

In the Authdog console, select the project and environment, open Authentication > Providers, find Twitch, and click Enable. Copy the redirect URI shown in the form:

https://identity.authdog.com/api/v1/callback/<connectionId>

Register the Twitch application

1. Open the Twitch Developer Console and select Register Your Application. Two-factor authentication must be enabled on the account first.
2. Name the application — names are globally unique on Twitch.
3. Under OAuth Redirect URLs, add the redirect URI from Authdog. Several are allowed.
4. Pick a category and create the application.
5. Open Manage and copy the Client ID, then select New Secret and copy the value.

Configure Authdog

Save, then toggle the connection active.

What Twitch returns

Authdog requests user:read:email and reads the profile from https://api.twitch.tv/helix/users — the numeric user ID, login name, display name, avatar, and the account's email address.

Login names change when a streamer rebrands; the numeric ID does not, and that is what Authdog links on. Store the display name for presentation, never as a key.

Twitch's Helix API requires the client ID on every profile request alongside the access token, which Authdog handles as part of the exchange. A client secret regenerated on Twitch invalidates the one stored in Authdog immediately — update the connection in the same sitting.

Test it

1. Open your environment's hosted sign-in page, or link to https://identity.authdog.com/api/v1/signin/<connectionId>.
2. Select the Twitch button and authorize.
3. Confirm the user appears under Users with an email address attached.

Troubleshooting

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