Team Avangar has been one of the teams competing at the Major. The team lost to Quantum Bellator fire in the Challengers stage and they were kicked out of the Major. That being said, it is still a notable achievement as they were just one map away from being in the Legends stage at the Major.
https://twitter.com/AVANGAR_fans/status/952536287394848770
The players were discovered via the local CSGO server wherein the Avangar owner scouted them from their matchmaking.