chore: include region info on not sign in error msg (#462)
chore: include region info on not sign in error msg (#462)

Thus the error message "User doesn't sign in." becomes more friendly to users with applications at multi regions.

Thank YuGao for bringing this to our attention (ticket 37295).
leancloud/lean-cli,leancloud/lean-cli,leancloud/lean-cli,leancloud/lean-cli