Rename 'joinchallenge' to 'enroll'
Rename 'joinchallenge' to 'enroll'

Seems like a better word to use.

xcat2/confluent,jjohnson42/confluent,whowutwut/confluent,jjohnson42/confluent,jjohnson42/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,whowutwut/confluent,whowutwut/confluent,whowutwut/confluent,xcat2/confluent,xcat2/confluent,xcat2/confluent