Variable: tramp-default-user
tramp-default-user is a customizable variable defined in tramp.el.gz.
Value
nil
Documentation
Default user to use for transferring files.
It is nil by default; otherwise settings in configuration files like
"~/.ssh/config" would be overwritten. Also see tramp-default-user-alist.
Probably introduced at or before Emacs version 23.1.
Source Code
;; Defined in /usr/src/emacs/lisp/net/tramp.el.gz
(defcustom tramp-default-user nil
"Default user to use for transferring files.
It is nil by default; otherwise settings in configuration files like
\"~/.ssh/config\" would be overwritten. Also see `tramp-default-user-alist'."
:type '(choice (const nil) string))