$ sudo apt-get update
$ sudo apt-get install erlang-oauth2 

erlang-oauth2 is installed in your system.

Make ensure the erlang-oauth2 package were installed using the commands given below,

$ sudo dpkg-query -l | grep erlang-oauth2 *

You will get with erlang-oauth2 package name, version, architecture and description in a table

erlang-oauth2 package basic information: