Slack

Sign in with Slack (openid.connect flavor). No PKCE, no id-token direct sign-in.

Configure

from better_auth import BetterAuth
from better_auth.oauth.providers_ext import Slack

auth = BetterAuth(
    secret=...,
    social_providers={
        "slack": Slack(client_id="…", client_secret="…"),
    },
)

Or name-keyed (no import):

auth = BetterAuth(
    secret=...,
    social_providers={
        "slack": {"client_id": "…", "client_secret": "…"},
    },
)

Options

Field	Type	Default	Notes
client_id	str | list[str]	required
client_secret	str	required

All shared ProviderConfig options apply.

Notes

• Default scopes: openid profile email.
• Register {base_url}{base_path}/callback/slack as a redirect URL on the Slack app (Slack requires HTTPS redirect URLs).
• Slack namespaces most userinfo claims under literal https://slack.com/… URIs: the user id is https://slack.com/user_id, and the avatar falls back to https://slack.com/user_image_512 when picture is absent.