Well the formatting was a dead giveaway for hex, so I check the username and got @treasure55 immediately. I was assuming Marky was keeping it simple and thought the pass followed as easily as the username, but I was wrong! I actually got to the point of reversing it and just kinda hail mary'ed it (forward and back) trying to find out what algorithm hashed it (was gonna try to crack it). I ran it through LM, NTLM, md2, md4, md5, md5(md5_hex), md5-half, sha1, sha224, sha256, sha384, sha512, ripeMD160, whirlpool, MySQL 4.1+ (sha1(sha1_bin)), and a few other checks. NO DICE!

In terms of caesar ciphers, I always though of ROT1, ROT2, ROT3, and so on, but haven't even thought about them since I was a kid doing it by hand haha.