add logout, team selection

src/controllers/team.js

@@ -5,6 +5,7 @@ utils = require("../lib/utils");
 exports.getTeams = async (req, res, next) => {
   const {layout} = req
   const {user_id} = req.params
+  req.session.current_team_id = null
   promise = teamsnap.loadTeams({'userId':user_id}, 
   (err, items) =>{
     teamsnapCallback(err,items);