userId 확인

GET /user/id ⇒ 200


userComponent

Untitled

GET /user/{:userId}/info ⇒ 200

PUT /user/{:userId}/block ⇒ 201 || 204 || 403

DELETE /user/{:userId}/block ⇒ 204 || 403

PUT /user/{:userId}/friend ⇒ 201 || 204 || 400 || 403