How do I setup id when creating new users?

I am trying to use stripe plugin

databaseHooks: {
  user: {
    create: {
      before: async (user, context) => {
        // Generate user ID from email
        console.log("User before creation:", user);
        
                
        if (user.email) {
          const customId = generateUserId(user.email);
          
          return { 
            data: { 
              ...user, 
              id: customId
            },
            forceAllowId: true // This is required to allow custom IDs
          };
        }
        
        // If no email is available, let BetterAuth generate the ID
        return { data: user };
      },
      after: async (user) => {
        // Perform actions after user creation
        console.log("User after creation:", user);
      }
    },

databaseHooks: {
  user: {
    create: {
      before: async (user, context) => {
        // Generate user ID from email
        console.log("User before creation:", user);
        
                
        if (user.email) {
          const customId = generateUserId(user.email);
          
          return { 
            data: { 
              ...user, 
              id: customId
            },
            forceAllowId: true // This is required to allow custom IDs
          };
        }
        
        // If no email is available, let BetterAuth generate the ID
        return { data: user };
      },
      after: async (user) => {
        // Perform actions after user creation
        console.log("User after creation:", user);
      }
    },

2025-06-02T19:51:30.109Z WARN [Better Auth]: [Kysely Adapter] - You are trying to create a record with an id. This is not allowed as we handle id generation for you, unless you pass in the forceAllowId parameter. The id will be ignored. Create method with id being called at: at createWithHooks (webpack-internal:///(rsc)/./node_modules/better-auth/dist/shared/better-auth.XjdOGtZf.mjs:78:85) at process.processTicksAndRejections (node:internal/process/task_queues:95:5) at async Object.createOAuthUser (webpack-internal:///(rsc)/./node_modules/better-auth/dist/shared/better-auth.XjdOGtZf.mjs:158:27) at async handleOAuthUserInfo (webpack-internal:///(rsc)/./node_modules/better-auth/dist/shared/better-auth.Dvh-YFwT.mjs:1285:14)

14 Replies

ilya•4mo ago

Have the same problem, did you manage to solve it?

Ping•4mo ago

Right now there isn't a way to generate an ID like this. Your best bet if you really want a custom ID for users is to pass an id generator in your auth config via advanced.database.generateId

ilya•4mo ago

@Ping I do need, cause I have to maintain backward compatibility with my DB. my user.id filed called user.userId, and I have to keep the id and userId equal during user creation. Unless you can suggest any other way to do so. For now, I had to downgrade the library to 1.2.3 version. Here is my code:

 databaseHooks: {
    user: {
      create: {
        before: async (user) => {
          const userId = generateId(24);
          return {
            data: {
              ...user,
              id: userId,
              userId, // id alias
              subscriptionStatus: SubscriptionStatus.FREE,
              primaryProvider: IdentityProvider.email,
            },
          };
        },
        after: async (user) => {
          await streamClient.upsertUsers([
            {
              id: user.id,
              name: user.email,
              first_name: user.email,
              email: user.email,
            },
          ]);

          await cqrsEvent({
            userId: user.id,
            eventName: TopologyEvents.PROFILE_CREATED,
            data: {},
          });
        },
      },
    },
  },

 databaseHooks: {
    user: {
      create: {
        before: async (user) => {
          const userId = generateId(24);
          return {
            data: {
              ...user,
              id: userId,
              userId, // id alias
              subscriptionStatus: SubscriptionStatus.FREE,
              primaryProvider: IdentityProvider.email,
            },
          };
        },
        after: async (user) => {
          await streamClient.upsertUsers([
            {
              id: user.id,
              name: user.email,
              first_name: user.email,
              email: user.email,
            },
          ]);

          await cqrsEvent({
            userId: user.id,
            eventName: TopologyEvents.PROFILE_CREATED,
            data: {},
          });
        },
      },
    },
  },

Can you please advice?

Ping•4mo ago

Opened a PR to support passing id. You can track it here: https://github.com/better-auth/better-auth/pull/3048

GitHub

feat(database-hooks): Allow passing id in DB hook create by pin...

It&#39;s the same to using a custom idGenerator, except configurable by the database hook which would in theory provide more data. A use-case is to generate the id based on user info in the use...

ilya•4mo ago

Thanks! I see it doesn't pass the tests

Cory•4mo ago

is there a way to implement something similar for organizations? A littile different, but basically I want to create a column based off the id, but the ID is not passed to the "before" db hook for the organization

Cory•4mo ago

Ping•4mo ago

Not right now, but once database hooks are supported across all tables, you should be able to achieve this using DB hooks.

Cory•4mo ago

ilya•4mo ago

@Ping It seems like the user.id is not passed in the regular before create dbhook eaither. Here is my code:

  databaseHooks: {
    user: {
      create: {
        before: async (user) => {
          console.log(user);
          const userId = generateId(24);
          return {
            data: {
              ...user,
              // id: userId,
              userId, // id alias

  databaseHooks: {
    user: {
      create: {
        before: async (user) => {
          console.log(user);
          const userId = generateId(24);
          return {
            data: {
              ...user,
              // id: userId,
              userId, // id alias

And here is the log of user that I'm getting:

ANY /hono/api/auth/sign-in/email-otp (λ: honoApp)
{
  createdAt: 2025-06-23T15:46:46.122Z,
  updatedAt: 2025-06-23T15:46:46.122Z,
  emailVerified: true,
  email: 'ilya+registerbetter@agavehealth.com',
  name: ''
}

ANY /hono/api/auth/sign-in/email-otp (λ: honoApp)
{
  createdAt: 2025-06-23T15:46:46.122Z,
  updatedAt: 2025-06-23T15:46:46.122Z,
  emailVerified: true,
  email: 'ilya+registerbetter@agavehealth.com',
  name: ''
}

Is there any way to get user.id in the database before hook?

Ping•4mo ago

When DB hooks are supported for all tables is when this will be supported, right now you can't

ilya•4mo ago

So there is no way for me to set a duplicated id for any other field in the table rn? Do you have an ETA when it will be supported? @Ping

Ping•4mo ago

Not sure, it will definitely be after 1.3. We need all adapters to use our createAdapter wrapper function in order for us to start work on features like this. Right now mongoDb adpater doesn't use it, and other community made ones are not either. It may take some time as we will need to add warnings to users for those who are using adapters which doesn't use createAdapter and stuff to alert the adapter maintainers to update...

ilya•4mo ago

Got you, thank you for the response. I'm now trying to use the after: hook

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How do I setup id when creating new users?

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