Code #1

Observations

All letters, go through your usual ciphers

Spoiler

Atbash didn’t give anything, my next step is usually ROT. ROT -3 gives the answer

threecuesixpursueethreeheightc

3cue6pursuee3h8c

That one is quite obvious what cipher was used

Spoiler

Converting the string from morse to text we get

9TDD0XI U4A8T

Obviously we need to manipulate the string to get the right passcode format. Swap the morse bits

....- . .-- .-- ..... .--. -- -.-. --. ----. -. ...-- .

Now convert this string from morse to text

4EWW5PMCG9N3E

No hint or spoiler needed, just enter in the scanner !