I would like to generate the token for login using springboot, The token is generating while checking using postman, but I am getting null in console
Authenticate controller
package com.demo.grocery.controller; import com.demo.grocery.config.JwtUtils; import com.demo.grocery.model.JwtRequest; import com.demo.grocery.model.JwtResponse; import com.demo.grocery.model.User; import com.demo.grocery.service.impl.UserDetailsServiceImpl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.ResponseEntity; import org.springframework.security.authentication.AuthenticationManager; import org.springframework.security.authentication.BadCredentialsException; import org.springframework.security.authentication.DisabledException; import org.springframework.security.authentication.UsernamePasswordAuthenticationToken; import org.springframework.security.core.userdetails.UserDetails; import org.springframework.security.core.userdetails.UsernameNotFoundException; import org.springframework.web.bind.annotation.*; import java.security.Principal; @RestController public class AuthenticateController { @Autowired private AuthenticationManager authenticationManager; @Autowired private UserDetailsServiceImpl userDetailsServiceImpl; @Autowired private JwtUtils jwtUtils; //generate token @CrossOrigin("http://localhost:4200") @PostMapping("/generate-token") public ResponseEntity<?> generateToken(@RequestBody JwtRequest jwtRequest) throws Exception { try { this.authenticate(jwtRequest.getUsername(), jwtRequest.getPassword()); } catch (UsernameNotFoundException e) { // TODO: handle exception e.printStackTrace(); throw new Exception("User Not Found"); } ////////////authenticate UserDetails userDetails = this.userDetailsServiceImpl.loadUserByUsername(jwtRequest.getUsername()); String token = this.jwtUtils.generateToken(userDetails); return ResponseEntity.ok(new JwtResponse(token)); } private void authenticate(String username, String password) throws Exception { try { authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(username, password)); } catch (DisabledException e) { e.printStackTrace(); throw new Exception("USER DISABLED "+e.getMessage()); } catch(BadCredentialsException e) { throw new Exception("Invalid Credentials "+e.getMessage()); } } //returns the details of current logged in user @CrossOrigin("http://localhost:4200") @GetMapping("/current-user") public User getCurrentUser(Principal principal) { return (User) this.userDetailsServiceImpl.loadUserByUsername(principal.getName()); } } JwtAuthenticationFilter
package com.demo.grocery.config; import com.demo.grocery.service.impl.UserDetailsServiceImpl; import io.jsonwebtoken.ExpiredJwtException; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.security.authentication.UsernamePasswordAuthenticationToken; import org.springframework.security.core.context.SecurityContextHolder; import org.springframework.security.core.userdetails.UserDetails; import org.springframework.security.web.authentication.WebAuthenticationDetailsSource; import org.springframework.stereotype.Component; import org.springframework.web.filter.OncePerRequestFilter; import javax.servlet.FilterChain; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @Component public class JwtAuthenticationFilter extends OncePerRequestFilter { @Autowired private UserDetailsServiceImpl userDetailsService; @Autowired private JwtUtils jwtUtil; @Override protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException { final String requestTokenHeader = request.getHeader("Authorization"); System.out.println(requestTokenHeader); String username = null; String jwtToken = null; if (requestTokenHeader != null && requestTokenHeader.startsWith("Bearer ")) { // yes jwtToken = requestTokenHeader.substring(7); try { username = this.jwtUtil.extractUsername(jwtToken); } catch (ExpiredJwtException e) { e.printStackTrace(); System.out.println("jwt token has expired.."); } catch (Exception e) { e.printStackTrace(); System.out.println("error"); } } else { System.out.println("Invalid Token, Not Starts with bearer String"); } //validate Token if(username!=null && SecurityContextHolder.getContext().getAuthentication() == null) { final UserDetails userDetails = this.userDetailsService.loadUserByUsername(username); if(this.jwtUtil.validateToken(jwtToken, userDetails)) { //token is valid UsernamePasswordAuthenticationToken usernamePasswordAuthentication = new UsernamePasswordAuthenticationToken(userDetails,null,userDetails.getAuthorities()); usernamePasswordAuthentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request)); SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthentication); } else { System.out.println("Token is not Valid"); } } filterChain.doFilter(request, response); } } Service
package com.demo.grocery.service.impl; import com.demo.grocery.model.User; import com.demo.grocery.repository.UserRepo; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.security.core.userdetails.UserDetails; import org.springframework.security.core.userdetails.UserDetailsService; import org.springframework.security.core.userdetails.UsernameNotFoundException; import org.springframework.stereotype.Service; @Service public class UserDetailsServiceImpl implements UserDetailsService { @Autowired private UserRepo userRepository; @Override public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException { User user = this.userRepository.findByUsername(username); if (user == null) { System.out.println("User Not Found"); throw new UsernameNotFoundException("No User Found!!"); } return user; } } Output in intelliji
Postman output 
Look into the screenshots and help me to solve the issue. Why it is storing as null?
