How to verify based on two or more column (col1 & col2) = (col1 & col2) in Python?

Question

Can anyone help me to join based on two or more columns (col1 & col2) = (col1 & col2) in Python? For example, I want output based on Date & Id (both should match same at a time).

DataFrame 1
Unnamed: 0  app_open_date   User_Id     
0         2022-05-14        a   
1         2022-04-19        b   
2         2022-04-29        c       
3         2022-05-24        a       
4         2022-06-03        a       

DataFrame 2
Unnamed: 0  app_open_date   User_Id     
0         2022-05-14        g   
1         2022-04-19        d   
2         2022-04-29        e       
3         2022-05-24        a       
4         2022-06-03        a

Output
Unnamed: 0  app_open_date   User_Id     
3         2022-05-24        a       
4         2022-06-03        a