auth.js

// auth.js in nuxtjs/store

export const state = () => {
  return {
    session: {
      user: null,
      token: null
    }
  }
}

export const mutations = {
  SET_TOKEN(state, token) {
    state.session.token = token
  },
  SET_CURRENT_USER(state, user) {
    state.session.user = user
  }
}

export const actions = {
  async nuxtServerInit({ dispatch }, { req }) {
    const token = getTokenFromCookie(req)
    if (token) {
      await dispatch('refreshSession', { token })
    }
  },

  setToken({ commit }, token) {
    Cookie.set('token', token)
    commit('SET_TOKEN', token)
    this.$axios.setToken(token, 'Token')
  },

  me({ commit }) {
    this.$axios
      .get('/auth/me')
      .then(({ data }) => {
        commit('SET_CURRENT_USER', data)
      })
      .catch(err => {
        console.log(err)
      })
  },

  refreshSession({ dispatch }, { token }) {
    dispatch('setToken', token)
    dispatch('me')
  },
}

index.js

// index.js in nuxtjs/store
export const actions = {
  async nuxtServerInit({ dispatch }, context) {
    await dispatch('auth/nuxtServerInit', context)
  }
}