Changes to Register financial institution account

added the new optional request property account_holder_type

media type application/vnd.api+json was changed to a more general media type application/json for the response status 200

media type application/vnd.api+json was changed to a more general media type application/json for the response status 401

media type application/vnd.api+json was changed to a more general media type application/json for the response status 403

media type application/vnd.api+json was changed to a more general media type application/json for the response status 404

media type application/vnd.api+json was changed to a more general media type application/json for the response status 409

media type application/vnd.api+json was changed to a more general media type application/json for the response status 500

added the non-success response with the status 409

endpoint added