BA
Better Auth•2mo ago
poteboy

onLinkAccount not triggered when linking anonymous user with social account (BetterAuth v1.2.12)

Hi, I'm running into a problem likely related to #1457. I am building an app using Expo ~53.0.9 on the client and Hono ^4.7.11 on the server. BetterAuth version is v1.2.12. On the client side, I authenticate as an anonymous user and then try to link a Google account. However, the onLinkAccount callback on the server is never triggered. Here is the server-side config: 
export const auth = betterAuth({
  database: prismaAdapter(prisma, {
    provider: 'postgresql',
  }),
  baseURL: process.env.SERVER_URL || 'http://localhost:2020',
  socialProviders: {
    google: {
      clientId: process.env.GOOGLE_CLIENT_ID || '',
      clientSecret: process.env.GOOGLE_CLIENT_SECRET || '',
    },
  },
  plugins: [
    anonymous({
      onLinkAccount: async ({ anonymousUser, newUser }) => {
        // This is not called
        console.info('=== onLinkAccount callback triggered ===');
      },
    }),
    expo(),
    bearer(),
  ],
  trustedOrigins: ['http://localhost:8081', 'http://localhost:8082'],
});
export const auth = betterAuth({
  database: prismaAdapter(prisma, {
    provider: 'postgresql',
  }),
  baseURL: process.env.SERVER_URL || 'http://localhost:2020',
  socialProviders: {
    google: {
      clientId: process.env.GOOGLE_CLIENT_ID || '',
      clientSecret: process.env.GOOGLE_CLIENT_SECRET || '',
    },
  },
  plugins: [
    anonymous({
      onLinkAccount: async ({ anonymousUser, newUser }) => {
        // This is not called
        console.info('=== onLinkAccount callback triggered ===');
      },
    }),
    expo(),
    bearer(),
  ],
  trustedOrigins: ['http://localhost:8081', 'http://localhost:8082'],
});
And here’s the client-side config: 
export const authClient = createAuthClient({
  baseURL: `${SERVER_URL}`,
  basePath: '/api/auth',
  schema: 'MyApp',
  plugins: [
    expoClient({
      scheme: 'MyApp',
      storagePrefix: 'MyApp',
      storage: SecureStore,
    }),
    anonymousClient(),
  ],
});
export const authClient = createAuthClient({
  baseURL: `${SERVER_URL}`,
  basePath: '/api/auth',
  schema: 'MyApp',
  plugins: [
    expoClient({
      scheme: 'MyApp',
      storagePrefix: 'MyApp',
      storage: SecureStore,
    }),
    anonymousClient(),
  ],
});
What ends up happening is: - The existing anonymous user is deleted from the Users table - A new user is created and linked to the account from Google login Is there something missing in my config to enable onLinkAccount to fire? Thanks!
GitHub
better-auth/better-auth
The most comprehensive authentication framework for TypeScript - better-auth/better-auth
1 Reply
poteboy
poteboyOP•2mo ago
it seems that onLinkAccount is not called when running without ID token sign-in. If I manually send the provider request from the mobile device and then verify the ID token, onLinkAccount does get triggered.

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