Remove deleted users

• Remove deleted users from list of fetched users
• Update tests

src/store/modules/users.js

@@ -66,7 +66,7 @@ const users = {
       dispatch('FetchUsers', { page: state.currentPage })
     },
     async DeleteUser({ commit, dispatch, getters, state }, user) {
-      const { data } = await deleteUser(user.nickname, getters.authHost, getters.token)
+      const { nickname } = await deleteUser(user.nickname, getters.authHost, getters.token)
       const users = state.fetchedUsers.filter(user => user.nickname !== data)
       commit('SET_USERS', users)
     },