I can't seem to add myself to the dialout group

question

> sudo usermod -aG dialout travis

> sudo usermod -aG dialout travis

I logout, then login, then:

> groups travis
travis : travis wheel input

> groups travis
travis : travis wheel input

I work with a lot of microcontrollers so constantly having to run

sudo chmod a+rw /dev/ttyACM0

sudo chmod a+rw /dev/ttyACM0

every time I plug one in gets tedious. What am I missing?