Unable to delete existing pipeline job via API, please help!

Hi All,
I have the issue that i am unable to delete the pipeline or job using API
syntax
curl -s --header “PRIVATE-TOKEN: xxxxx” https://xxxx.xxxxx.com/api/v4/projects/2/members

result

body{background:white}self.location='/index.php?m=user&f=ssologin&referer=L2FwaS92NC9wcm9qZWN0cy8yL21lbWJlcnM=';

it seems i already connect to gitlab but gitlab unable to return anything

regards,
wenfeng