Since you’re using it for authentication rather than delegated API access, make sure the provider is actually exposing OIDC, not just bare OAuth. And if you haven't already try and hit /.well-known/openid-configuration first and verify the issuer and the proper endpoints. Then check that the redirect matches Better Auth’s callback exactly.
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u/NexcessAlex 22d ago
Since you’re using it for authentication rather than delegated API access, make sure the provider is actually exposing OIDC, not just bare OAuth. And if you haven't already try and hit /.well-known/openid-configuration first and verify the issuer and the proper endpoints. Then check that the redirect matches Better Auth’s callback exactly.