http://127.0.0.1:5000/api/user/auth POST registrate
http://127.0.0.1:5000/api/user/login POST
http://127.0.0.1:5000/api/user/ PUT change data
http://127.0.0.1:5000/api/todo POST create todo
http://127.0.0.1:5000/api/todos GET get info todo
http://127.0.0.1:5000/api/todos GET all todo in your group
http://127.0.0.1:5000/api/todo DELETE delete todo
http://127.0.0.1:5000/api/groups POST create group
http://127.0.0.1:5000/api/groups GET groups where user participate
http://127.0.0.1:5000/api/:group_id DELETE exit from group