So unfortunately I’ve had to discontinue work on the MightyText plugin for Pidgin.
Semi-recently, Google changed their authentication process to no longer allow an old type of auth. Unfortunately, the new system (OAuth) relies on the user having a web browser to login with, which isn’t something we can assume with libpurple (have you tried using a text-based web browser with Finch?!). Although I managed to find a way around this, to connect back from OAuth into the MightyText server requires a great deal of effort that ended up going nowhere.
So, regretfully I’ve had to stop.