baseURL in case of wildcard subdomains?

I wasn't able to find this in the docs, maybe I didn't look in the right place.

I have multi-tenancy with subdomains, and I want the auth paths to be on each tenant subdomain, for ex:

acme.myapp.com/auth/login

acme.myapp.com/auth/login

acme.myapp.com/auth/login

acme.myapp.com/auth/login

foo.myapp.com/auth/login

foo.myapp.com/auth/login

foo.myapp.com/auth/login

foo.myapp.com/auth/login

Does better auth support this? The

baseUrl

baseUrl

baseUrl

baseUrl value is what's tripping me up. I'm using Fastify, so I'm thinking of doing the following:

use a preHandler hook, where I get the subdomain, generate the tenant-specific
```
baseUrl
```
baseUrl
```
baseUrl
```
baseUrl
, and create a better-auth instance.
Decorate the request with the better-auth instance
in the
```
/api/auth
```
/api/auth
```
/api/auth
```
/api/auth
route, do
```
await req.auth.handler(req);
```
await req.auth.handler(req);
```
await req.auth.handler(req);
```
await req.auth.handler(req);

Is there anything about this that wouldn't work, or be problematic?

baseURL in case of wildcard subdomains?

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