CheckLogin - check login.

DropSession - drop session.

GenerateErrorResponse - error response generation procedure.

GetSession - get session.

Login - method login.

LogOut - close session.

MetodOrPatchNotFound - stub for methods not described.

NewRequest - create new request.

OtherMetods - execution of the rest of any methods.

SendRequest - send request.

UUIDIsValid - check uuid for correctness.