my users list

good morning
has each time I of installe subonic, y do not have my users' lists anymore. I follow make to re-inscribe them has each time I install subsonic. how to safeguard them?
meric for your answer
has each time I of installe subonic, y do not have my users' lists anymore. I follow make to re-inscribe them has each time I install subsonic. how to safeguard them?
meric for your answer