Add a security directive for authentication

[myazinn]

rc-events module should contain a directive that extracts a token from a request header and parses it to a User. Note that for rc-events module a User is just an object that consists of email an id.

[myazinn]

The authorization token must be passed by a user in an Authorization header with Bearer prefix. Example:
Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE2Njc4Mjk3MDUsImlhdCI6MTY1MjI3NzcwNSwidXNlcklkIjoiNmVjYzQ2ZmItOTFiOS00YzBlLThhNmMtYjI0OGI4YTdhNWZhIiwiZW1haWwiOiJqb2huX2RvZUBlbWFpbC5jb20ifQ.Kpd_qU2EZsDOR4BzW0_c4Pc63sxzE68pMLVsHc6pjgU
This token must have two fields: userId and email, so we can create a custom domain user with these fields. You can use https://jwt.io resource to decipher JWT token and see which info is encoded into it.