http://localhost:3001/auth/google/callback Google Auth

Ah, I've been developing an app doing other things with Google Auth, I need to understand how why is it normally

http://localhost:3001/auth/google/callback

http://localhost:3001/auth/google/callback

for google Auth, why not 3000? is /auth/google/callback a reserved route?
I think so

http://localhost:3001/auth/google/callback Google Auth - Wasp