ClientSide

const wsClient = new SubscriptionClient(SUB_ENDPOINT, {
      reconnect: true,
      timeout: 30000, 
      connectionParams: {
   
         token : JSON.parse(localStorage.getItem('token')),
       
        

      }
    })

ServerSide

onConnect: (connectionParams, webSocket) => {
      if (connectionParams) {
       console.log( connectionParams)
..................................

As soon as i refresh my client app, it always return me the last one, and not the new token after the login? Can someone explain it to me?

noone can without seeing your code. I recommend starting a new discussion here: https://www.graph.cool/forum/c/questions