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The first part:
{ read A; read B; printf "%s\n" "$A" "$B"; sort; } < file
reads the first line from file into the shell variable A (read A) and the second line from file into the shell variable B...

Store the entire line, $0, in the array. Because the key $1 is part of the $0, one does not need to print it at the END.
awk '!($1 in A) || $2=="add" {A[$1]=$0} END{for(i in A) print A[i]}' file

Hi, try:
awk '!($1 in A) || $2=="add" {A[$1]=$2} END{for(i in A) print i, A[i]}' file

or if
user role
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is part of the file:
awk 'FNR<3{print; next} !($1 in A) || $2=="add"...