in src/main/java/com/aws/pattern/myapp/security/SecurityUtils.java [45:51]
public static Optional<String> getCurrentUserJWT() {
SecurityContext securityContext = SecurityContextHolder.getContext();
return Optional
.ofNullable(securityContext.getAuthentication())
.filter(authentication -> authentication.getCredentials() instanceof String)
.map(authentication -> (String) authentication.getCredentials());
}