[feat] add vendor .signUp() and .signIn() request handlers
[feat] add vendor .signUp() and .signIn() request handlers

ibari/zibzoo,ahmedmodan/zibzoo,ahmedmodan/zibzoo,altroncwd/zibzoo,ibari/zibzoo,unforgitables/zibzoo,altroncwd/zibzoo,unforgitables/zibzoo