...
Validate auth method. il.authentication_method_request.auth_methos_current.type = OTP
Check that authentication_method_request.status = NEW
Validate preson_id
validate person.id UUID
in case error return
404
search person by person.id in MPI or person.is_active = false
in case error return
404
, "Such person doesn't exist"
validate that person is active ( person.status = active)
in case error return
409
, "Such person isn't active"
Generate verification code
...