Create a Dedicate import user

create a user for imports

create user impuser identified by impuser123;
grant create session to impuser;
grant unlimited tablespace to impuser;
select default_tablespace, username, profile from dba_users
where username='IMPUSER';
grant DATAPUMP_IMP_FULL_DATABASE, DATAPUMP_EXP_FULL_DATABASE to impuser;
create directory TEST_DIRECTORY as '<location>';
grant read,write on directory TEST_DIRECTORY to impuser;