[Token doesn’t work and the profile component doesn’t run. showing token not authenticated

router.post('/login', (req, res, next) => {

    User.findOne({ email: req.body.email }, (err, user) => {
      if (err) throw err;
  
      if (!user) {
        res.json({
          success: false,
          message: 'Authenticated failed, User not found'
        });
      } else if (user) {
  
        var validPassword = user.comparePassword(req.body.password);
        if (!validPassword) {
          res.json({
            success: false,
            message: 'Authentication failed. Wrong password'
          });
        } else {
          var token = jwt.sign({
            user: user
          },'123456', process.env.JWT_SECRET_KEY,{
            expiresIn: '7d'
          });
  
          res.json({
            success: true,
            message: "Enjoy your token",
            token: token
          });
        }
      }
  
    });
  });

  router.route('/profile')
  .get(checkJWT, (req, res, next) => {
    User.findOne({ _id: req.decoded.user._id }, (err, user) => {
      res.json({
        success: true,
        user: user,
        message: "Successful"
      });
    });
  })
  .post(checkJWT, (req, res, next) => {
    User.findOne({ _id: req.decoded.user._id }, (err, user) => {
      if (err) return next(err);

      if (req.body.name) user.name = req.body.name;
      if (req.body.email) user.email = req.body.email;
      if (req.body.password) user.password = req.body.password;

      user.isSeller = req.body.isSeller;

      user.save();
      res.json({
        success: true,
        message: 'Successfully edited your profile'
      });
    });
  });
..................................................................................................................................................................................................................
<a *ngIf="token" (click)="collapse();" routerLink="/profile" class="dropdown-item">
                <i class="fa fa-user-circle" aria-hidden="true"></i> Profile
              </a>
              <a *ngIf="!token" (click)="collapse();" routerLink="/login" class="dropdown-item">
                <i class="fa fa-key" aria-hidden="true"></i> Login
              </a>
[Token doesn’t work and the profile component doesn’t run. showing token not authenticated. however token is correct.no error shown in my code. login successfully works. but next(); function is not run what can I do … here is my code of profile.js and jwt.js.

Source: Angular Questions