Fix typo in SMTP OAuth token refresh.
Fix typo in SMTP OAuth token refresh.

nylas/sync-engine,closeio/nylas,jobscore/sync-engine,closeio/nylas,nylas/sync-engine,jobscore/sync-engine,closeio/nylas,closeio/nylas,nylas/sync-engine,jobscore/sync-engine,jobscore/sync-engine,nylas/sync-engine