Help! I need a plugin like AuthMe for a Sponge Server

I tried to install TrixtaLogin for my minecraft server, but anyone could enter the server with the name of the founder and give himself permissions through the founder account, since the server is for SP, I need a plugin like AuthMe!
TrixtaLogin is quite disgusting btw
Someone can help me?
(i have sponge 7.1.0, with Pixelmon mod)

[sorry for bad english]