Is there a way call an alias without separating it from previous characters?

Super new to all of this. Trying to do the overthewire wargames to learn and thought it was a bit tedious to log in to each level, and wanted to make some shortcuts. I made an alias that can take the password for the next level and pass it through via sshpass which saves a good bit of typing. But I'm wondering if I can do the same for the connection address.

So far I turned this:

sshpass -p `sed -n "$p" banditpw` ssh <username>@bandit.labs.overthewire.org -p 2220

into just this:

sshp <username>@bandit.labs.overthewire.org -p 2200

I was wondering if I could do the same for the bandit.labs.overthewire.org -0 2200 part. I tried doing

alias otw="bandit.labs.overthewire.org -p 2220"

Which the terminal can recognize until I try to do this:

<username>@otw

It doesn't recognize I want to call the alias "otw" because it's unbroken from the @. Is there a way to get the terminal to understand I want to call an alias when it's not broken apart from the previous characters?

Also, I would just include the username@ in the alias, except that the username changes each level.

I think you want to login with something like that

$ user1@otw
$ user2@otw
$ user3@otw

I purpose to use function to login with something easy like that:

$ otw user1
$ otw user2
$ otw user3

• to make this function, you can do:

otw(){
user="$1"
sshpass -p `sed -n "$p" banditpw` ssh ${user}@bandit.labs.overthewire.org -p 2220
}