Is this possible?

I have a table that logs an entry. The table has 2 columns that I need joined to a table of users, the first column for who logged the entry and the second for who the entry should be assigned to. These could be the same or different users. I tried adding an alias to the columns to differentiate between them when I need to bind them but it didn't work. I'm so close, I'm just not sure how to get this to work.

Table 1
ID|added_by|assigned_to|action
1|1|2|Shut down  

Table 2
user_id|user_name
1|Juan
2|Xavier

So query result should be - 1 Juan Xavier Shut down

Thanks,