From G Suite Update on December 16, 2019 Google turned off less secure app access to G Suite accounts.
Microsoft Outlook users should download and install G Suite Sync for Microsoft® Outlook® (GSSMO) and G Suite Admin also turn on GSSMO.
tmux is a terminal multiplexer: it enables a number of terminals to be created, accessed, and controlled from a single screen. tmux may be detached from a screen and continue running in the background, then later reattached.