To get a free class coin:
-Head over to the trove website http://www.trionworlds.com/trove/
-You should see a big green button which says Redeem Code
-Add in this code LLE3J7RPGK6Z67Z2RRCR
-Sign in with your email and password
-After that it should appear Refer a Friend
-Go back to the game Trove
-Go to your inventory
-You should now have a grey class coin

Note:
-You can only get one
-If there is any error pop up, you probably have already inputed another code already (like I said only 1 coin). Make sure to check your inventory in the game.
-You can only redeem this code if you're under mastery rank 20