...

1. Verify the validity of access token

   1. Return 401 in case validation fails

2. Check user scopes in order to perform this action (scope = 'preperson_merge_request:write')

   1. Return 403 in case invalid scope(s)

Validate

...

merge request

1. Validate preperson merge request id exists in DB

   1. In case of error - return 404

2. Check preperson merge request status is NEW or APPROVED

   1. In case of error - return 422 (Incorrect status to reject preperson merge request)

Validate employee

...

1. Select inserted_at from il.person_requests of this preperson merge request

2. Compare user_id belongs to the same legal_entity_id where the preperson merge request was created.

   1. If not match - return 422 error (User doesn’t belong to legal entity where the preperson merge request was created)

...