Get User or Group Name

Question

if(
 rule!APN_IsBlank(ri!userOrGroup),
 "",
 if(
 runtimetypeof(topeople(ri!userOrGroup)) = 'type!{http://www.appian.com/ae/types/2009}User',
 user(touser(ri!userOrGroup), "firstName") & " " & user(touser(ri!userOrGroup), "lastName"),
 if(
 runtimetypeof(topeople(ri!userOrGroup)) = 'type!{http://www.appian.com/ae/types/2009}Group',
 group(togroup(ri!userOrGroup), "groupName"),
 ""
 )
 )
) 
 Hello All, 
 Please find the above code ( rule it is to get user or group name ) 
 when you enter a user name it's showing it is user and when you Test with a group name it's giving me an error 
 Please look at the code is there any mistake 
 Thanks in advance

gayathris0003 · Answer

= if(
runtimetypeof(
ri!userOrGroup
) = tointeger(
'type!{http://www.appian.com/ae/types/2009}Group'
),
if(
doesgroupexist(
togroup(
ri!userOrGroup
)
),
group(
togroup(
ri!userOrGroup
),
"groupName"
),
"N/A"
),
user(touser(ri!userOrGroup), "firstName") & " " & user(touser(ri!userOrGroup), "lastName"),
) Please share the error you are facing? Like Malathi said you can first check i f username taken or group exist. above code is one of the example.