get in with
US /ɡet ɪn wɪð/
UK /ɡet ɪn wɪð/

1.
to become friendly with someone, especially in order to gain an advantage
:
•
He's trying to get in with the popular crowd.
•
She managed to get in with the right people and got promoted quickly.
to become friendly with someone, especially in order to gain an advantage