Updated code

src/main/java/net/gepafin/tendermanagement/web/rest/api/UserApi.java

@@ -231,6 +231,7 @@ public interface UserApi {
                     @ApiResponse(responseCode = "400", description = "Bad Request", content = @Content(mediaType = MediaType.APPLICATION_JSON_VALUE, examples = {
                             @ExampleObject(value = ErrorConstants.BADREQUEST_ERROR_EXAMPLE)}))})
     @RequestMapping(value = "", produces = {"application/json"}, method = RequestMethod.GET)
+    @PreAuthorize("hasRole('ROLE_SUPER_ADMIN')")
     ResponseEntity<Response<List<UserResponseBean>>> getAllUsers(
             @Parameter( required = false)@RequestParam(value ="roleId", required = false) Long roleId);