added add_user and del_user

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 2.6)
-project (auth_service)
-set(CMAKE_CXX_STANDARD 11)
+project(auth_service)
+set(CMAKE_CXX_STANDARD 17)
 
 include_directories(./src/libs/)
 
@@ -12,4 +12,4 @@ add_executable(
     src/auth/auth.cpp 
     src/users/users.cpp
 )
-target_link_libraries(auth_service jwt-cpp::jwt-cpp)
+target_link_libraries(auth_service jwt-cpp::jwt-cpp)