How to extract the user and move it to a field in Splunk?

[LearningGuy]

How to extract the following user and move it to a field in Splunk?
message: xad="/home/andy"
message: xad="/home/george"
message: xad="/home/cindy"
and a lot more..
I would like to get an output as follows.    Because of the quote " before /home, Splunk rejected my regex. Please help. Thanks
user  
====    
andy
george
cindy

[yuanliu]

You obviously has a field named xad.  From this, no need for rex.

| eval user = mvindex(split(xad, "/"), 1)

[ITWhisperer]

I think @yuanliu meant

| eval user = mvindex(split(xad, "/"), 2)

Having said that, can you share the failed rex and/or the full events (anonymised, of course) in a code block </> to preserve the format of the event?