select kandimat_data.register_person(
               'Erika',
               'Mustermann',
               'erika@mustermann.de',
               'password'
           );
select kandimat_data.change_role(
               1,
               'kandimat_editor'
           );
select kandimat_data.register_person(
               'Max',
               'Mustermann',
               'max@mustermann.de',
               'password'
           );
select kandimat_data.change_role(
               2,
               'kandimat_candidate'
           );
select kandimat_data.register_person(
               'Tricia',
               'McMillan',
               'trillian@universe.com',
               'password'
           );
select kandimat_data.change_role(
               3,
               'kandimat_candidate'
           );
select kandimat_data.register_person(
               'Happy',
               'User',
               'happy@user.de',
               'password'
           );
select kandimat_data.change_role(
               4,
               'kandimat_person'
           );