Nostalrius Begins - Quality wow vanilla realm (1.12)

I used a mail that I always use and My password was 1 letter too long for the wow client to recognize it, is there any way that I can make it 1 letter shorter or do I have to create another email?

I saw people in other projects that had the same problem. Since the only way to change your pass is via ingame function, you will have to wait untill a gm does it for you.